προσέχειν
From LSJ
Ὁ δὲ μὴ δυνάμενος κοινωνεῖν ἢ μηδὲν δεόμενος δι' αὐτάρκειαν οὐθὲν μέρος πόλεως, ὥστε ἢ θηρίον ἢ θεός → Whoever is incapable of associating, or has no need to because of self-sufficiency, is no part of a state; so he is either a beast or a god
Greek > English (Woodhouse Verbs Reversed)
(see also προσέχω): concentrate, heed, mark, note, notice, apply one's mind to, attend to, devote oneself to, fix the attention on, give ear, pay attention to, pay attention, put ashore
Lexicon Thucydideum
attendere, to pay attention to, 1.95.2, 2.11.2,
item likewise 5.26.5. 6.93.2, 7.15.2, 7.23.1,
Absolute, absolutely 7.4.4, 7.75.7, [vulgo commonly προσχόντας]
MED. implicitum esse, to be involved in, 1.127.1.