alert
From LSJ
ἐπιπόλαια γὰρ λέγομεν τὰ παντὶ δῆλα → by superficial we mean those that are obvious to all
adj.
P. and V. ὀξύς.
Ready: P. and V. ἑτοῖμος.
Zealous: P. and V. πρόθυμος, ἔντονος, σύντονος.
Be on the alert: P. διὰ φυλακῆς ἔχειν, V. ἐν εὐφυλάκτῳ εἶναι; see watch.