a trace of someone's work; footprint

footprint

to vanish; to disappear

the act of vanishing, a disappearance

sudden

suddenly

all of a sudden, all at once

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