put in motion or move to act; "trigger a reaction"; "actuate the circuits"
leave; "The family took off for Florida"
direct attention to, as if by means of contrast; "This dress accentuates your nice figure!"; "I set off these words by brackets"
cause to burst with a violent release of energy; "We exploded the nuclear bomb"
make up for; "His skills offset his opponent's superior strength"
set in motion or cause to begin; "The guide set the tour off to a good start"
provoke or stir up; "incite a riot"; "set off great unrest among the people"