περισκοπεῖν

From LSJ

πάντες γὰρ οἱ λαβόντες μάχαιραν ἐν μαχαίρῃ ἀπολοῦνται → all they that take the sword shall perish with the sword

Source

Greek > English (Woodhouse Verbs Reversed)

(see also: περισκοπέω) examine, scrutinise, inquire into, look about one, look about, Look around, look around

Lexicon Thucydideum

circumspicere, look around, 1.36.1, 6.49.4.