pishi
A short, precise cracking or snapping sound — a whip cracking, a ruler hitting a desk, or something pulled taut suddenly. Conveys sharpness.
💡A teacher slapping a ruler on the desk — 'The ruler hit the desk pishi!'
定規で机をぴしっと叩いた。
The ruler struck the desk pishi.
The coach ___ clapped his hands to start the drill.
コーチが○○と手を叩いて練習を始めた。