Definition - A semantic-change process in which a shift in a word's denotation causes it to deviate from its etymological and/or literal meaning.

Example -
Because two additional months were added to the Roman calendar, the name September — which derives from the Latin septem, seven — now refers to the ninth month of the year, instead of the seventh.

Etymology -
The word derives from the Latin subreptio, a snatching away.
Note: In English the word was originally a term from ecclesiastical law that denoted either the suppression of the truth or the concealment of facts so as to obtain a dispensation.

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