to suddenly start laughing
突然笑い始める (totsuzen warai hajimeru)
"Everyone broke away into laughter after his funny comment."
"みんな彼の面白いコメントの後、笑い出しました。" (Minna kare no omoshiroi komento no ato, **warai dashimashita**.)
to be very successful in life or career
to reduce anxiety ahead of an event
to begin taking action toward a goal
to stop believing in someone or something
to increase speed or progress
to accept a duty or task
