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English word inane comes from Latin inanis (Empty, void, hollow. Foolish, inane. Vain. Worthless.)
inanis (Latin)
Empty, void, hollow. Foolish, inane. Vain. Worthless.
inane (Middle French)
inane (English)
That which is void or empty. Lacking sense or meaning (often to the point of boredom or annoyance). Purposeless; pointless.