Penknife, or pen knife, is a small folding knife. [1] Today penknife is also the common British English term for both a pocketknife, which can have single or multiple blades, and for multi-tools, with additional tools incorporated into the design. [2]
Originally, penknives were used for thinning and pointing quills (cf. penna, Latin for feather) to prepare them for use as dip pens and, later, for repairing or re-pointing the nib. [1] A penknife might also be used to sharpen a pencil, [3] prior to the invention of the pencil sharpener. In the mid-1800s, penknives were necessary to slice the uncut edges of newspapers and books. [4]
A penknife did not necessarily have a folding blade, but might resemble a scalpel or chisel by having a short, fixed blade at the end of a long handle.[ citation needed ]
During the 20th century there has been a proliferation of multi-function pocketknives with assorted blades and gadgets, [5] the most famous of which is the Swiss Army knife, referred to in British English as penknives.
A larger folding knife than a penknife, especially one in which the blade locks into place as a protection, as for skinning animals, is referred to by some as a claspknife. [5]
upon your knee with the back of a penknife,
As he came along in the train, he had been sharpening a pencil, and the sudden jolt of the engine as it drew up at a station had driven the penknife against his face...