also: はぎれがよい
expression, i-adjective (yoi/ii class)
crisp; clear; staccato; piquant
Describes speech, writing, or sound that is sharp, clear, and well-articulated, without hesitation or muddiness. Often used for a crisp manner of speaking or a distinct, staccato-like delivery.
彼の説明は歯切れがよくてわかりやすい。
His explanation is crisp and easy to understand.
あのアナウンサーは歯切れのいい話し
That announcer has a clear, staccato way of speaking.
From 歯切れ (hagire, 'the feel when biting' or 'crispness') + がいい (ga ii, 'is good'). The phrase originally described the crisp sensation of biting into something, then extended metaphorically to speech and sound.