ぶくり

adverb, adverb taking the 'to' particle

with a plop; with a bob

Mimetic word describing the sound or motion of something floating up or sinking down in water, often with a soft, buoyant quality.

• 池いけに落おち葉ばがぶくりと浮うかんだ。

  A fallen leaf bobbed to the surface of the pond with a plop.

• 小こ石いしを投なげると、ぶくりと沈しずんだ。

  When I threw a pebble, it sank with a plop.