Why is the ninth month called September?
mid-14c. (late 13c. in Anglo-French), from Old French interpretacion (12c.) and directly from Latin interpretationem (nominative interpretatio) "explanation, exposition," noun of action from past participle stem of interpretari (see interpret).
interpretation in·ter·pre·ta·tion (ĭn-tûr'prĭ-tā'shən)
The act or process of explaining the meaning of something.
A psychotherapist's explanation of the meaning of a patient's remarks, dreams, memories, experiences, and behavior.