(idiomatic) to do one's best; to do something to the best of one's ability

to cure, to heal

sickness / ill, sick

(slang) abnormal, mentally ill

the best

To exhaust; deplete; use up. / serve, assist

to do to exhaustion, to do something completely

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