remember, recall

(archaic, Shinto, Japanese mythology) an "oath", a ritual in which whether something is true or false, right or wrong, good or evil, etc. is judged based on whether the stated outcome of an act comes true as expected

vow / swear / pledge

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

(archaic) antique, old-fashioned / (colloquial) ancient

ancient times, antiquity, remote ages

to take a oath to oneself

taking a oath to oneself