dēficiō fēcī, fectus, ere (fut perf. defexit, old form. in L.

—Pass., usu. deficior; dēfit, T., Enn. ap. C., V.; dēfierī, T.; dēfīet, L.) de + facio.

— Intrans, to withdraw, revolt, desert, fall off: civitates quae defecerant, Cs.: milites ne deficerent, S.: ab Aeduis, Cs.: a re p.: a patribus ad plebem, to go over, L.: ad Poenos, desert, L.

— Of things, to be wanting, be absent, fail, cease, disappear, be lost, run out: non frumentum deficere poterat, Cs.: ex arboribus frons, Cs.: ne (mihi) vox viresque deficerent: non deficiente crumenā, H.: ne Deficeret navis, be overwhelmed, V.: quod plena luna defecisset, was eclipsed: ignem Deficere videbat, dying out, V.: quā deficit ignis, ceases to destroy, V.: Deficit ars, is exhausted, O.: nil apud me tibi defieri patiar, T.: Lac mihi non aestate novum defit, V.: nunquamne causa defiet, cur, etc.? L.

— Of persons, to fail, sink, faint, be insufficient, be missing: quod multi Gallicis tot bellis defecerant, had been lost, Cs.: siquid deficias, i. e. need aid, T.: deficientibus animis, L.: O dubiis ne defice rebus, fail (me) in perplexity, V.

—To fail, be bankrupt: Matho deficit, Iu.: te memorare, cease, Tb.

—Fig., to withdraw, depart, forsake, be parted, abandon, desert: a virtute: si utilitas ab amicitiā defecerit.

—To fail, be wanting, fall short: animo, be disheartened, Cs.: ne unā plagā acceptā patres deficerent: in limine primo, V.: illis legibus populus R. prior non deficiet, si prior defexit, etc., prove false, violate, L. (old form.): neque comminus pugnando deficiebant, Cs.

—Trans, to leave, desert, fail, abandon (of things): cum vires nostros deficerent, Cs.: me Leontina civitas: me vox, latera deficiant, si, etc.: cum deficit orbom (Sol), is eclipsed, O.: sol defectus lumine, Tb.: si quem proles defecerit omnis, i. e. perish, V.: cum aquilifer a viribus deficeretur, Cs.: mulier ratione deficitur: animo defici, Cu.: defecta vigore cervix, O.: nec me deficiet rogitare, etc., nor will I fail, Pr.