gachi-tto
The solid, reassuring click of something locking firmly into place. Heavier and more forceful than 'kachiri-to'.
💡Locking the front door before bed — 'The deadbolt clicked gachi-tto into place.'
ドアの鍵ががちっとかかった。
The door lock clicked gachi-tto shut.
I turned the key and the lock engaged ___ with a satisfying sound.
鍵を回すと○○とロックがかかった。