“exist” in Latin

exsistere: manere (to remain; e.g., parietes, quorum ornatus per tot secula manserat, Cic.). [Vid: To BE, To LIVE.] It is often, however, to be turned by a relative sentence with nunc. The indifference to religion that now exists, haec, quae nunc tenet seculum, negligentia deorum: the poems of Homer did not originally exist in their present form, *Homeri carmina formam, quam nunc habent, primo non habuerunt. ☞ With reference to past time, sometimes tum may help; from the spoils of any city that then existed, (neque) exunius tum urbis praeda (sperandum, etc., Liv., 1, 55): the generation that then existed, qui tum vivebant homines (Ennius).

Existing, mostly by nunc, in a relative sentence, qui (quae, quod) nunc est; and often by the demonstrative pronoun hie. Under exist circumstances, ut nunc est: the magnificence of our existing public works, horum magnificentia operum (Liv. 1, 55); the now-existing neglect of anything, haec, quae nunc tenet seculum, negligentia alicujus rei: the existing generation, hi (Varr.; potius ad antiquorum diligentiam, quam ad horum luxuriam, etc.).” The then existing,” may sometimes be translated by tum.