wake up / stay up, stay awake / get up, sit up / occur, happen

strengthen

precaution / caution

to be vigilant; to watch out

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

an earthquake

earthquake

(obsolete) an earthquake