amass, accumulate, collect / let pile up

a stamp; a substitute for postage stuck to the postcard

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

stocking up

stock up

stamp collecting; philately

to collect stamps

Alternative form of 切手収集