Kanji characters outside of the jōyō kanji and jinmeiyō kanji lists. For example, 攪.

to study / to learn

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

to come back, to return, to go back to

to return, go back / to move in the opposite direction / to interchange front and back / to change color, fade / (of a year) to renew / (by extension) to start over / to [verb] completely

use one thing for many purposes / work someone hard

to use one's head