copasetic [koh-p uh- set-ik, - see-tik] copacetic or co·pa·set·ic, co·pe·set·ic [koh-p uh- set-ik, - see-tik] fine; completely satisfactory; OK. Origin of copacetic 1915–20, ; of obscure origin; popular attributions of the word to Americanism Louisiana French, Italian, Hebrew, etc., lack supporting evidence
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for copasetic copacetic copasetic, copesetic or copesettic US and Canadian slang very good; excellent; completely satisfactory Word Origin for copacetic
C20: of unknown origin
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
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Word Origin and History for copasetic adj.
1919, but it may have origins in 19c. U.S. Southern black speech. Origin unknown, suspects include Latin, Yiddish (e.g. Hebrew
kol b'seder), Italian, Louisiana French ( coupe-sétique), and Native American. None is considered convincing by linguists.
Online Etymology Dictionary, © 2010 Douglas Harper