Translation guide
To suddenly start laughing loudly or uncontrollably.
急に笑い出す
burst into laughter
Describing the action of suddenly starting to laugh loudly, often in an uncontrolled way.
A natural, common way to say 'burst into laughter'. Literally 'suddenly start laughing'.
彼の冗談を聞いて、急に笑い出した。
Hearing his joke, I burst into laughter.
Similar to 急に笑い出す, but 突然 emphasizes the abruptness more strongly.
静かな部屋で、彼女が突然笑い出した。
In the quiet room, she burst into laughter.
Describes a group of people bursting into laughter together, or a loud, explosive laugh.
会場がどっと笑った。
The audience burst into laughter.
Literally 'laugh as if bursting out', emphasizing the sudden, explosive nature. Somewhat literary.
彼は噴き出すように笑った。
He burst into laughter.