to laugh;  to chuckle;  to smile;  to sneer
I cannot help laughing
He said with a laugh, so nobody believed him
There's nothing to laugh at
I wonder if An would laugh if he was the victim
Her answer knocked/wiped the smile off my face
To smile a grateful/sad/bitter smile
To smile one's consent/thanks
Smile!
to laugh;  to mock;  to make fun of ...
Don't laugh at her naivety !