K

This article is about the letter of the alphabet. For other uses, see K (disambiguation).

K
K k
Usage
Writing system	Latin script
Type	Alphabetic and Logographic
Language of origin	Latin language
Sound values	[ k ] [ kʰ ] [ kʼ ] [ ɡ ] /keɪ/
In  Unicode	U+004B, U+006B
Alphabetical position	11
History
Development	Κ κ ϰ 𐌊 K k
Time period	~−700 to present
Descendants	•K  • Ʞ  • ₭
Sisters	К כ ך ک ك ܟ ࠊ 𐎋 ከ Կ կ Հ հ Խ խ
Other
Associated graphs	k(x)
Writing direction	Left-to-right
This article contains phonetic transcriptions in the International Phonetic Alphabet (IPA).For an introductory guide on IPA symbols, see Help:IPA.For the distinction between [ ], / / and ⟨ ⟩, see IPA § Brackets and transcription delimiters.

K, or k, is the eleventh letter of the Latin alphabet, used in the modern English alphabet, the alphabets of other western European languages and others worldwide. Its name in English is kay (pronounced /ˈkeɪ/ ), plural kays. ^[1]

The letter K usually represents the voiceless velar plosive.

History

Egyptian hieroglyph D	Proto-Sinaitic K	Proto-Canaanite kap	Phoenician kaph	Western Greek Kappa	Etruscan K	Latin K

The letter K comes from the Greek letter Κ (kappa), which was taken from the Semitic kaph, the symbol for an open hand. ^[2] This, in turn, was likely adapted by Semitic tribes who had lived in Egypt from the hieroglyph for "hand" representing /ḏ/ in the Egyptian word for hand, ⟨ḏ-r-t⟩ (likely pronounced /ˈcʼaːɾat/ in Old Egyptian). The Semites evidently assigned it the sound value /k/ instead, because their word for hand started with that sound. ^[3]

K was brought into the Latin alphabet with the name ka /kaː/ to differentiate it from C, named ce (pronounced /keː/) and Q, named qu and pronounced /kuː/. In the earliest Latin inscriptions, the letters C, K and Q were all used to represent the sounds /k/ and /ɡ/ (which were not differentiated in writing). Of these, Q was used before a rounded vowel (e.g. ⟨EQO⟩ 'ego'), K before /a/ (e.g. ⟨KALENDIS⟩ 'calendis'), and C elsewhere. Later, the use of C and its variant G replaced most usages of K and Q. K survived only in a few fossilized forms, such as Kalendae, "the calends". ^[4]

After Greek words were taken into Latin, the kappa was transliterated as a C. Loanwords from other alphabets with the sound /k/ were also transliterated with C. Hence, the Romance languages generally use C, in imitating Classical Latin's practice, and have K only in later loanwords from other language groups. The Celtic languages also tended to use C instead of K, and this influence carried over into Old English.

Use in writing systems

Pronunciation of ⟨k⟩ by language

Orthography	Phonemes	Environment
Standard Chinese (Pinyin)	/kʰ/
English	/k/, silent
Esperanto	/k/
Faroese	/k/
	/tʃʰ/	Before ⟨e⟩ (except ⟨ei⟩), ⟨i⟩, and ⟨j⟩
German	/k/
Ancient Greek romanization	/k/
Modern Greek romanization	/k/	Except before /e,i/
	/c/	Before /e,i/
Icelandic	/kʰ/, /cʰ/, /k/, /c/, /ʰk/, /x/
Norwegian	/k/	Except before ⟨i⟩ or ⟨y⟩
	/ç/	Before ⟨i⟩ or ⟨y⟩
Swedish	/k/
	/ɕ/	Before ⟨e⟩, ⟨i⟩, ⟨y⟩, ⟨y⟩, ⟨ä⟩, ⟨ö⟩
Turkish	/k/	Except before ⟨â⟩, ⟨e⟩, ⟨i⟩, ⟨ö⟩, ⟨û⟩, ⟨ü⟩
	/c/	Before ⟨â⟩, ⟨e⟩, ⟨i⟩, ⟨ö⟩, ⟨û⟩, ⟨ü⟩

English

The letter usually represents /k/ in English. It is silent when it comes before ⟨n⟩ at the start of a stem, e.g.:

• At the start of a word (knight, knife, knot, know, and knee)
• After a prefix (unknowable)
• In compounds (penknife)

English is now the only Germanic language to productively use "hard" ⟨c⟩ (outside the digraph ⟨ck⟩) rather than ⟨k⟩ (although Dutch uses it in loan words of Latin origin, and the pronunciation of these words follows the same hard/soft distinction as in English).^{[ citation needed ]}

Like J, X, Q, and Z, the letter K is not used very frequently in English. It is the fifth least frequently used letter in the English language, with a frequency in words of about 0.8%.

Other languages

In most languages where it is employed, this letter represents the sound /k/ (with or without aspiration) or some similar sound.

The Latinization of Modern Greek also uses this letter for /k/. However, before the front vowels (/e,i/), this is rendered as [ c ], which can be considered a separate phoneme.

Other systems

The International Phonetic Alphabet uses ⟨k⟩ for the voiceless velar plosive.

Other uses

Main article: K (disambiguation)

• In the International System of Units (SI), the SI prefix for one thousand is kilo-, officially abbreviated as k: for example, prefixed to metre/meter or its abbreviation m, kilometre or km signifies a thousand metres. As such, people occasionally represent numbers in a non-standard notation by replacing the last three zeros of the general numeral with K, as in 30K for 30,000.
• "K" replacing "C" in satiric misspelling.
• K is the unit symbol for the kelvin, used to measure thermodynamic temperature (the degree sign is not used with this symbol).
• K is the chemical symbol for element potassium (from its Latin name kalium).
• Triangle K.
• In chess notation, the letter K represents the King (WK for White King, BK for Black King).
• In baseball scoring, the letter K is used to represent a strikeout. A forwards oriented K represents a "strikeout swinging"; a backwards oriented K ( ) represents a "strikeout looking".
• As an abbreviation for OK, often used in emails and short text messages.
• K is used as a slang term for Ketamine among recreational drug users.
• In the CMYK color model, K represents black ink.
• In International Morse code, it is used to mean "over". ^[5]
• In fracture mechanics, K is used to represent the stress intensity factor.
• In physics, k usually stands for the Boltzmann constant.
• In Argentinian politics, K is used as a symbol for Kirchnerism.
• K (logic).
• In the United Kingdom under the old system (before 2001), a licence plate that begins with "K" for example "K123 XYZ" would correspond to a vehicle registered between August 1, 1992, and July 31, 1993. Again under the old system, a licence plate that ends with "K" for example "ABC 123K" would correspond to a vehicle that was registered between August 1, 1971, and July 31, 1972.
• On Idaho license plates, an initial K in the plate number indicates it was issued in Kootenai County.

Related characters

Ancestors, descendants and siblings

• 𐤊 : Semitic letter Kaph, from which the following symbols originally derive:
• Κ κ/ϰ : Greek letter kappa, from which K derives
• К к : Cyrillic letter Ka, also derived from Kappa
• K with diacritics: Ƙ ƙ, Ꝁ ꝁ, Ḱ ḱ, Ǩ ǩ, Ḳ ḳ, Ķ ķ, ᶄ, Ⱪ ⱪ, Ḵ ḵ
  • Ꞣ and ꞣ were used in Latvian orthography before 1921 ^[6]
• The Uralic Phonetic Alphabet uses various forms of the letter K: ^[7]
  • U+1D0BᴋLATIN LETTER SMALL CAPITAL K
  • U+1D37ᴷMODIFIER LETTER CAPITAL K
  • U+1D4FᵏMODIFIER LETTER SMALL K
• ₖ : Subscript small k was used in the Uralic Phonetic Alphabet prior to its formal standardization in 1902. ^[8]
• Ʞ ʞ : Turned capital and small k were used in transcriptions of the Dakota language in publications of the American Board of Ethnology in the late 19th century. ^[9] Turned small k was also used for a velar click in the International Phonetic Alphabet but its use was withdrawn in 1970.
• 𝼐 : Small capital turned k is used as a click letter ^{[10] [11]}
• 𝼃 : Small letter reversed k is used as a Voice Quality Symbol (VoQS) ^{[12] [11]}

Ligatures and abbreviations

• ₭ : Lao kip
• Ꝃ ꝃ, Ꝅ ꝅ : Various forms of K were used for medieval scribal abbreviations ^[13]

Other representations

Computing

Character information

Preview	K		k		K		Ｋ		ｋ
Unicode name	LATIN CAPITAL LETTER K		LATIN SMALL LETTER K		KELVIN SIGN		FULLWIDTH LATIN CAPITAL LETTER K		FULLWIDTH LATIN SMALL LETTER K
Encodings	decimal	hex	dec	hex	dec	hex	dec	hex	dec	hex
Unicode	75	U+004B	107	U+006B	8490	U+212A	65323	U+FF2B	65355	U+FF4B
UTF-8	75	4B	107	6B	226 132 170	E2 84 AA	239 188 171	EF BC AB	239 189 139	EF BD 8B
Numeric character reference	K	K	k	k	K	K	Ｋ	Ｋ	ｋ	ｋ
EBCDIC family	210	D2	146	92
ASCII [lower-alpha 1]	75	4B	107	6B

Other

NATO phonetic	Morse code
Kilo	▄▄▄ ▄ ▄▄▄  ⓘ

Signal flag	Flag semaphore	American manual alphabet (ASL fingerspelling)	British manual alphabet (BSL fingerspelling)	Braille dots-13 Unified English Braille

Notes

1. Also for encodings based on ASCII, including the DOS, Windows, ISO-8859 and Macintosh families of encodings.

References

1. "K" Oxford English Dictionary, 2nd edition (1989); Merriam-Webster's Third New International Dictionary of the English Language, Unabridged (1993); "kay," op. cit.
2. "K". The Oxford English Dictionary, 2nd ed., 1977, online (registration required)^{[ dead link ]}
3. Gordon, Cyrus H. (1970). "The Accidental Invention of the Phonemic Alphabet". Journal of Near Eastern Studies. 29 (3): 193–197. doi:10.1086/372069. JSTOR   543451. S2CID   161870047.
4. Sihler, Andrew L. (1995). New Comparative Grammar of Greek and Latin (illustrated ed.). New York: Oxford University Press. p. 21. ISBN   0-19-508345-8. Archived from the original on 9 November 2016. Retrieved 18 October 2016.
5. Stephen Phillips (4 June 2009). "International Morse Code". Archived from the original on 12 February 2014. Retrieved 10 February 2014.
6. "Latin Extended-D" (PDF). Archived (PDF) from the original on 25 March 2019. Retrieved 6 March 2019.
7. Everson, Michael; et al. (20 March 2002). "L2/02-141: Uralic Phonetic Alphabet characters for the UCS" (PDF). Archived (PDF) from the original on 19 February 2018. Retrieved 24 March 2018.
8. Ruppel, Klaas; Aalto, Tero; Everson, Michael (27 January 2009). "L2/09-028: Proposal to encode additional characters for the Uralic Phonetic Alphabet" (PDF). Archived (PDF) from the original on 11 October 2017. Retrieved 24 March 2018.
9. Everson, Michael; Jacquerye, Denis; Lilley, Chris (26 July 2012). "L2/12-270: Proposal for the addition of ten Latin characters to the UCS" (PDF). Archived (PDF) from the original on 30 March 2019. Retrieved 24 March 2018.
10. Miller, Kirk; Sands, Bonny (10 July 2020). "L2/20-115R: Unicode request for additional phonetic click letters" (PDF). Archived (PDF) from the original on 8 October 2022. Retrieved 12 October 2022.
11. Anderson, Deborah (7 December 2020). "L2/21-021: Reference doc numbers for L2/20-266R "Consolidated code chart of proposed phonetic characters" and IPA etc. code point and name changes" (PDF). Archived (PDF) from the original on 8 January 2021. Retrieved 12 October 2022.
12. Miller, Kirk; Ball, Martin (11 July 2020). "L2/20-116R: Expansion of the extIPA and VoQS" (PDF). Archived (PDF) from the original on 24 October 2020. Retrieved 12 October 2022.
13. Everson, Michael; Baker, Peter; Emiliano, António; Grammel, Florian; Haugen, Odd Einar; Luft, Diana; Pedro, Susana; Schumacher, Gerd; Stötzner, Andreas (30 January 2006). "L2/06-027: Proposal to add Medievalist characters to the UCS" (PDF). Archived (PDF) from the original on 19 September 2018. Retrieved 24 March 2018.

External links

• Media related to K at Wikimedia Commons
• The dictionary definition of K at Wiktionary
• The dictionary definition of k at Wiktionary