Futile

google

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mid 16th century: from Latin futilis ‘leaky, futile’, apparently from fundere ‘pour’.

wiktionary

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From Middle French futile, from Latin fūtilis.

etymonline

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futile (adj.)

"incapable of producing result," 1550s, from French futile or directly from Latin futilis, futtilis "vain, worthless, futile," a figurative use, literally "pouring out easily, easily emptied" (the Latin adjective used as a noun meant "a water vessel broad above and pointed below"), hence "leaky, unreliable," from fundere "to pour, melt," from nasalized form of PIE root *gheu- "to pour." Related: Futilely.