• Etymology Today from M-W: tantivy \tan-TIH-vee/
:in a headlong dash : at a gallop

"Tantivy" is also a noun meaning "a rapid gallop" or "an impetuous rush." Although its precise origin isn't known, one theory has it that "tantivy" represents the sound of a galloping horse's hooves. The noun does double duty as a word meaning "the blare of a trumpet or horn." This is probably due to confusion with "tantara," a word for the sound of a trumpet that came about as an imitation of that sound. Both "tantivy" and "tantara" were used during foxhunts; in the heat of the chase people may have jumbled the two.

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