dentist

bruxism / gnashing one's teeth out of anger etc.

grind one's teeth during one's sleep / gnash one's teeth out of anger etc.

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 sleep / to go to bed / (と～) to sleep with, to have sexual intercourse with / to lie down / (of miso, sake, etc.) to ripen, to ferment, to cure

sleep, sleeping

(archaic) to sleep

(obsolete) sleep, sleeping