Compute

google

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early 17th century: from French computer or Latin computare, from com- ‘together’ + putare ‘to settle (an account)’.

wiktionary

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17th century. Borrowed from French computer, from Latin computō(“calculate, compute”). Doublet of count.

etymonline

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compute (v.)

1630s, "determine by calculation," from French computer (16c.), from Latin computare "to count, sum up, reckon together," from com "with, together" (see com-) + putare "to reckon," originally "to prune," from PIE root *pau- (2) "to cut, strike, stamp." A doublet of count (v.). Related: Computed; computing.