どっと
dotto

Adverb

1. bursting out (laughter); breaking out (applause); roaring; whooping

Onomatopoeia
学童 がくどうたちはどっと わらった。
gakudōtachiwa dotto waratta.
The pupils burst out laughing.
Adverb

2. in a rush; in a surge; flooding in; pouring in

Onomatopoeia
Adverb

3. suddenly; all of a sudden

Onomatopoeia
Other forms: