Entire

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late Middle English (formerly also as intire ): from Old French entier, based on Latin integer ‘untouched, whole’, from in- ‘not’ + tangere ‘to touch’.

wiktionary

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From Middle English entere, enter, borrowed from Anglo-Norman entier, from Latin integrum, accusative of integer, from in-(“not”) + tangō(“touch”). Doublet of integer.

etymonline

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entire (adj.)

mid-14c., of things, "whole, intact," from Old French entier "whole, unbroken, intact, complete," from Latin integrum "completeness" (nominative integer; see integer). Related: Entireness.