set off
Pronunciation:
verb
Definitions
To leave; to begin a journey or trip.
Example: He set off in search of better opportunities.
To begin; to cause; to initiate.
Example: I had no idea that one simple comment would set off such a huge argument.
To cause to explode, let off.
Example: What a tragedy, that someone would set off a bomb in a crowded place.
To make angry.
Example: Don't set him off or he won't shut up all day.