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

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

art / technique / skill / means / trick / resources / magic

technique / art / way, means

means, way

use one thing for many purposes / work someone hard

to use one's head

everything