set off, depart / start from / emit / discharge / disclose / occur

(by extension) Counter for other things which are "fired". / Counter for artillery fire. Round.

one day

one, 1 / the first in order, foremost / the beginning / the best / a kind of; one of something / (card games) an ace / unity / the bottom string of a shamisen or other Japanese musical instrument

each person

graduation examination

practical test

(law) a bar examination

litmus test

a mock exam