λόγῳ ἀναλίσκω τὸν χρόνον τῆς ἡμέρας → waste the day in idle talk, consume the duration of the day with talk
prōfĭcŭus: a, um,I adj proficio, beneficial, advantageous, conducive (late Lat): quibus mora potest esse proficua, Cassiod. Var. 1, 39.