戦い, 闘い: fight; battle, war / 戦い, 闘い: match, competition, contest, race / 戦い, 闘い: conflict, strife / 戦い, 闘い: army, military, troops

last, end, conclusion / last, final

once

to swear, to pledge, to make an oath, to vow

an oath, pledge / (Shinto, Buddhism) vow that the Buddha pledged to save sentient beings

conjunctive form of 誓う (chikau) [godan]

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 battle, to fight, to wage war / to compete (in a match, for example) / to contend (for one's own interests) / (figuratively) to get through with one's sufferings or difficulties