poton
The gentle sound of a small, somewhat heavy object falling and landing — a ripe fruit dropping, a marble falling onto a cushion.
💡A ripe persimmon falling from a tree — 'The fruit dropped poton onto the ground.'
柿の実がぽとんと地面に落ちた。
The persimmon fell poton to the ground.
A tear ___ fell onto the open page of her diary.
涙が日記のページに○○と落ちた。