ad·jec·tive                                                                                                                                           [Middle English, from Old French adjectif, from Late Latin adiectīvus, from adiectus, past participle of adicere, to add to : ad-, ad- + iacere, to throw; see yē- in Indo-European roots.]

yē- / Indo-European roots

Examples of words with the root yē-: abject, adjacent, adjective, amice, catheter, circumjacent, conjecture, deject, diesis, ejaculate, eject, enema, gist, inject, interject, jactitation, jess, jet, joist, object, paresis, parget, project, reject, subjacent, subject, superjacent, synesis, traject.

yē-

To throw, impel.

Contracted from *yeh1-.

1. Extended zero-grade forms *yak-yo- and *yak-ē- (stative) gisant, gist, gite, jactitation, jess, jet2, jeté, jetsam, jettison, jetty1, joist, jut; abject, adjacent, adjective, amice, circumjacent, conjecture, deject, ease, ejaculate, eject, inject, interject, object, parget, project, reject, subjacent, subject, superjacent, traject from Latin iacere, to throw, lay, and iacēre, to lie down (< "to be thrown") and iaculum, dart.

2. Basic form *yē- and zero-grade form *yə-. catheter, diesis, enema, paresis, synesis from Greek hīenai, to send, throw.

[Pokorny i̯ē- 502.]