to attack, to combat / (dated) to follow (as successor) / to visit suddenly / (of an incapacitating feeling) to overcome one

all of a sudden, all at once

sudden

suddenly

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

attack, rush on, jump

(genetics) mutation

(colloquial) current boyfriend