thrice
Thrice (adv) means Three times. Example: “He knocked thrice before giving up and leaving.”
How to use thrice
Learner’s notesIn plain EnglishAn old-fashioned way of saying "three times."
Sounds formal or poetic today; in everyday speech people just say "three times."
Fill the gap
Can you complete this real example?
He knocked _____ before giving up and leaving.
Etymology
From Old English þriwa ("three times") plus an old adverb-forming ending — the same pattern that gave us "once" and "twice."