ἄγνωστος · agnōstos — LSJ
unknown, unheard of, forgotten, unfamiliar
unknown, τινί Od. 2.175; unheard of, forgotten, Mimn. 5.7; ἄ. ἐς γῆν E. IT 94; unfamiliar, Arist. Top. 149a5 (Comp.).
2 not to be known, most unintelligible
not to be known, ἄγνωστόν τινα τεύχειν Od. 13.191; πάντεσσι ib. 397; ἀγνωστστατοι γλῶσσαν most unintelligible in tongue, Th. 3.94.
3 not an object of knowledge, unknowable, harder to know
not an object of knowledge, unknowable, ἄλογα καὶ ἄ. Pl. Tht. 202b; ἡ ὕλη ἄ. καθʼ αὑτήν Arist. Metaph. 1036a9; in Comp., harder to know, ib. 995a2. Adv. -τως Procl. in Alc. p.52C.
4
as the name of a divinity at Athens, νὴ τὸν Ἄγνωστον Ps.-Luc. Philopatr. 9, cf. Act.Ap. 17.23; in pl., θεῶν . . ὀνομαζομένων ἀ. Paus. 1.1.4.
II not knowing, ignorant of, inconsiderately
Act., not knowing, ignorant of, ψευδέων Pi. O. 6.67 (v.l. ἄγνωτον), cf. Luc. Halc. 3. Adv. -τως inconsiderately, Phld. Lib. p.29 O.