to strain (one's voice) / to use all of (one's strength)

to try, attempt / to taste, sample

last, end, conclusion / last, final

putting a machine into operation / putting into action

to put a machine into operation / to put into effect

once

ability; capability; capacity; faculty

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