List of Greek and Latin roots in English/J
# List of Greek and Latin roots in English/J

* A
* B
* C
* D
* E
* F
* G
* H
* I
* J
* K
* L
* M
* N
* O
* P
* Q
* R
* S
* T
* U
* V
* X
* Z

## J

| 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 |
| 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, injucundity, jocund, jocundity |
| juven- | young, youth | Latin | juvenis | juvenile, rejuvenate |
| juxta- | beside, near | Latin | juxta | juxtaposition |
