Definitely

来自Big Physics
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wiktionary

ref 

definite +‎  -ly


etymonline

ref

definitely (adv.)

"in a definite manner," 1580s, from definite + -ly (2). As a colloquial emphatic word, attested by 1931.

取自“https://www.bigphysics.org/index.php?title=Definitely&oldid=21405”