笑う, 咲う, 嗤う, わらう
Conjugated: 笑うな
Godan verb, Intransitive
1. to laugh
2. to smile
esp. 嗤う
3. to sneer, to ridicule
as 笑ってしまう or 笑っちゃう
4. to be dumbfounded, to be flabbergasted
クラスのもの皆が彼の冗談に笑った。
な
Particle, prohibitive; used with dictionary form verb
1. don't
imperative (from なさい); used with -masu stem of verb
2. do
Interjection, See なあ
3. hey, listen, you
when seeking confirmation, for emphasis, etc.; used at sentence end
4. now, ..., well, ..., I tell you!, you know
used to express admiration, emotionality, etc.; used at sentence end
5. wow, ooh