(to cause a bomb etc) to explode with a loud noise

set off bomb

(one of) a series of horizontal or sloping bars or rods of a fence etc; a continuous line of such bars, laid on the ground for trains; to criticize a person angrily

criticize harshly

smoulder

burn, simmer

to use threats against (a person); to warn of (something bad); to seem likely to occur or come

warn, pressure