Word-Built World: ratiocination

ratiocination (n.)

“process of reasoning, mental process of passing from the cognition of premises to the cognition of the conclusion,” 1520s, from Latin ratiocinationem (nominative ratiocinatio) “a reasoning, calm reasoning,” noun of action from past-participle stem of ratiocinari “to reckon, compute, calculate; to deliberate, meditate; to reason, argue, infer.” This is a compound of ratio “reckoning, calculation,” also “judgment, reason” (see ratio) + -cinari, which probably is related to conari “to endeavor, to try,” from PIE *kona-, from root *ken- “to hasten, set oneself in motion” (see deacon).

(etymonline.com)

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