adverb, adverb taking the 'to' particle
with a rattling sound; with a gentle clinking sound; rapping (on a door)
Describes a light, repeated knocking or rattling sound, such as small objects hitting each other or a gentle knock on a door.
風で窓がコトコトと揺れた。
The window rattled gently in the wind.
誰かがドアをコトコトとノックした。
Someone rapped lightly on the door.
adverb, adverb taking the 'to' particle
at a simmer; boiling gently; bubbling lightly
Used in cooking contexts for a gentle simmer with small bubbles and a soft bubbling sound.
鍋をコトコトと煮込む。
Simmer the pot gently.