ἀπρονόητος
σιγᾶν ἄμεινον ἢ λαλεῖν ἃ μὴ πρέπει → it's better to keep silence than to say what's not appropriate (Menander)
English (LSJ)
ον,
A unpremeditated, ἀκρασία Arist.MM1203a30; χώρα ἀ. an unguarded country, Plb.4.5.5; τόποι ἀ. unreconnoitred, Id.3.48.4; not the work of providence, κόσμος Ph.2.411, cf. Hierocl. in CA11p.442M. II Act., not considering beforehand, ἡ ὀργὴ -τον X.HG 5.3.7; ἀ. καὶ ἀπαράσκευοι Plb.5.7.2, cf. Orph.Fr.233; ἀ. τῶν ἐσομένων J.Vit.13; τῶν ἐπὶ γῆς πραγμάτων Luc.Bis Acc.2, etc.; of the gods, not exercising providence, Epicur.Fr.368. Adv. -τως X.Cyr.1.4.21, etc.; ἀ. τινὸς ἔχειν Str.2.5.1; opp. προνοίᾳ, S.E.P.1.151; οἱ ἀ. θεώμενοι without previous acquaintance, Plb.10.14.8.
German (Pape)
[Seite 338] unüberlegt, Sp.; τόποι, nicht vorher durchforscht, Pol. 3. 48, 4; χώρα 4, 5, 5; gew. akt., nicht vorher überlegend, unbedachtsam, Xen. Hell. 5, 3, 7; τινός, nicht dafür besorgt, Luc. Bis acc. 2. – Adv., Xen. Cyr. 1, 4, 21; unvermuthet, λαμβάνεται Pol. 5, 7, 2.