from the beginning:
I.of things, ancient, primeval, olden, Hdt., attic
2.like ἀρχαϊκός, old-fashioned, antiquated, primitive, Aesch., Ar.
II.of persons, ancient, old, Aesch., Thuc., etc.: οἱ ἀρχαῖοι the Ancients, the old Fathers, Prophets, NTest.
III.adv. ἀρχαίως, anciently, Dem.; so, τὸ ἀρχαῖον, ionic contr. τὠρχαῖον Hdt., attic τἀρχαῖον Aesch.
2.in olden style, Plat., Aeschin.