noun
sharpness; cutting ability
Describes the quality of a blade's edge; how well it cuts. Can be used literally for knives, swords, scissors, etc.
この包丁は切れ味がいい。
This kitchen knife cuts well.
研いだ後の切れ味を試す。
Test the sharpness after sharpening.
noun
incisiveness; quickness of wit; skill
Figurative extension: sharpness of mind, speech, or performance. Used for clever remarks, keen analysis, or technical brilliance.
彼の議論には切れ味がある。
His arguments are incisive.
あのピアニストの演奏は切れ味が鋭い。
That pianist's performance is technically brilliant.
noun
peppiness (of a ball)
Sports term: describes a ball's lively, sharp movement (e.g., in baseball or tennis).
彼の投げるボールは切れ味が違う。
The ball he throws has exceptional movement.