どすっと

adverb

thump; thud; bump; clunk

Mimetic adverb for a heavy, dull impact sound or the manner of landing heavily. Often used with 落ちる, ぶつかる, or 座る.

See also: どすん

• 大おおきな荷に物もつがどすっと床ゆかに落おちた。

  The heavy luggage fell onto the floor with a thud.

• 彼かれは疲つかれてどすっとソファに座すわった。

  Exhausted, he plopped down heavily onto the sofa.