How do you say laugh in Japanese?

笑う /wa ra u/ is the Japanese Word for 'to laugh'. If you need it in imperative form, like saying to someone 'laugh!' it would be 笑ってください /wa ra-tte ku da sai/ in polite and 笑ってくれ /wa ra-tte ku re/ in common spoken form, and 笑え /wa ra e/ in plain form, which could be also thought of as arrogant tone/offensive to say it like that, depending on who to use it for.