どんと

adverb

powerfully; vigorously; with all one's strength

Describes doing something with great physical force or energy, often in a single decisive action.

• 彼かれはどんと机つくえを叩たたいた。

  He banged the desk powerfully.

• 相撲すもう取とりがどんとぶつかった。

  The sumo wrestlers collided with great force.

adverb

lots of; heaps of; plenty

Indicates a large amount or abundance, often used with verbs like ある or くれる to emphasize generosity or plentifulness.

• おばあちゃんがお菓か子しをどんとくれた。

  Grandma gave me heaps of sweets.

• 冷れい蔵ぞう庫こには食しょく材ざいがどんとある。

  There's plenty of food in the fridge.