fuse; pilot light / cause of a conflict; origin; trigger

ignition

to ignite

fireworks

he / distal demonstrative, something far off removed from both speaker and listener: that / boyfriend

distal demonstrative, something far off removed from both speaker and listener: that, yon / particularly, male personal third person pronoun: he / by extension from he: boyfriend

he; boyfriend

sparkler (a type of firework)

fireworks show; fireworks display

everything