Alternative form of 白河夜船 (shirakawa yofune)

being fast asleep, dead to the world when sleeping / pretending to know everything, a know-it-all manner

to sleep / (figuratively) to die; to be buried

deep, profound

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

deep, close, thick, profound

deep, profound

everything