Root Meaning in English Origin language Etymology (root origin) English examples jac- lie Latin jaceo "to be thrown"adjacency, adjacent, circumjacency, circumjacent, ease, easy, interjacent, interjoist, joist , nonadjacent, subjacent, superjacent jac- , -ject- cast, throw Latin jacio (also spelled iacio ), iectus abject, adjectival, adjective, conjectural, conjecture , deject, dejection, disject, disjection, ejaculate, ejaculation, ejaculatory, eject, ejecta , ejection, ejective , ejectment, ejector, inject, injection , injective , injector , interject, interjection , interjectional, interjector, interjectory, introject, introjection , introjective, jactation, jactitation, jaculate, jaculation, jaculator, jaculatory, jaculiferous, jet , jetsam, jettison, nonobjective, object, objectification, objection, objectionable, objective , objectivity, objector, parget, project, projectile , projection, projective, projector, reject, rejectamenta, rejection, subject, subjection, subjective, subjectivity, subjicible, surjection, surjective , traject, trajectile, trajection, trajectory , trijet janu- door Latin janua janitor , January joc- jest Latin jocus (also spelled iocus )jewel, jewelry, jocose, jocosity, jocular, jocularity, joke, jongleur, juggle, injucundity, jocund, jocundity journ- pertaining to the day, daily Latin diurnus (also spelled journe )adjourn, journal, journalist, journey, journeyman, sojourn judic- judge Latin iudex , iūdicis adjudicate, adjudication, adjudicative, adjudicator , adjudicatory, extrajudicial, injudicious, judge, judgement, judgment, judgmental, judicable, judicative, judicator, judicatory, judicature, judicial, judiciary, judicious, nonjudgmental, nonjudicial, prejudge, prejudgment, prejudice, prejudicial, quasijudicial jug- yoke Latin jugo , jugum conjugal, subjugate jung- , junct- join Latin iungo , junctus adjoin, adjoint, adjunct , adjunction, adjunctive, conjoin, conjoint, conjunct , conjunction , conjunctive, disjoin, disjoint, disjunct, disjunction, disjunctive, enjoin, enjoinder, enjoinment, injunction, injunctive, join, junction, juncture, junta, junto, nondisjunction , nonjoinder, rejoin, rejoinder, sejoin, sejungible, subjoin, subjoinder, subjunctive , surrejoinder junior- younger Latin junior junior, juniority jus- , jur- law, justice Latin ius , iuris abjure, jurisprudence, jury, just, justice, objurgate, perjury juv- , jut- help Latin juvo , jutus adjument, adjutant, adjutor, adjutory, adjutrix, coadjutant, coadjutor juven- young, youth Latin juvenis juvenile , rejuvenate juxta- beside, near Latin juxta juxtaposition