クスッと

くすっと くすりと

unintentionally, slipping out (e.g. a chuckle)

ニヤッと笑う

ニヤッとわらう にやっとわらう

to give a broad grin, to smirk

笑う

わらう

to laugh

にこっと笑う

にこっとわらう

to smile pleasantly

山笑う

やまわらう

mountain in springtime when all of the tree buds open at the same time (usu. in haiku), laughing mountain

ケラケラ笑う

ケラケラわらう

to cackle

ゲラゲラ笑う

to guffaw; to roar with laughter; to laugh heartily

ひとり笑い

ひとりわらい

laughing by oneself

笑

LOL; haha

笑うに笑えない

わらうにわらえない

being unable to laugh (at a funny but serious situation); forced to hold back laughter

あざ笑う

あざわらう せせらわらう

to sneer at, to ridicule

嘲り笑う

あざけりわらう

to laugh to scorn

膝が笑う

ひざがわらう

to have one's knees be about to give way

笑うべき

わらうべき

laughable; ridiculous; funny; comical

鼻で笑う

はなでわらう

to laugh scornfully

鬼が笑う

おにがわらう

to be laughable, to be unrealistic

来年のことを言うと鬼が笑う

らいねんのことをいうとおにがわらう

nobody knows the morrow; speak of next year and the ogres laugh

笑覧

しょうらん

smiling while looking at, enjoying reading

巧笑

こうしょう

courteous laughter, forced laughter