Na-adjective (keiyodoshi), Nounwise; sagacious; intelligent; sensible

I-adjective (keiyoushi)clever; smart · sharp (ear, etc.); sensitive; discerning

I-adjective (keiyoushi)sharp-eyed; keen-eyed · easily awakened

I-adjective (keiyoushi)sharp-eared; have sharp ears; picks things up fast

Expressions (phrases, clauses, etc.), I-adjective (keiyoushi)wide-awake to one's interests