searchlight

darkness, the dark, complete absence of light; a dark place / (figuratively) public chaos, disorder in the world / an unknown or hidden place / (figuratively) jail, prison

(figuratively, possibly obsolete) psychological distress, the state of being at a loss

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

to illuminate / to shine upon / to refer to

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

use one thing for many purposes / work someone hard

to use one's head