to close, fill up/block up completely

cement (a powdered substance)

Alternative form of 塡 (“to fill in; to fill up”)

to use / to employ / to make use of, to apply / to spend

to block / to shut off / to close / fort; fortress

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

hole, opening

hole / opening, aperture / pit / cave, cavern / lair, den, burrow / loss, deficit / flaw, defect