Conceal

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Middle English: from Old French conceler, from Latin concelare, from con- ‘completely’ + celare ‘hide’.

wiktionary

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From Middle English concelen, from Old French conceler(“hide, disguise”), from Latin concelāre, infinitive of concelō(“carefully disguise”).

etymonline

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conceal (v.)

early 14c., concelen, "to keep close or secret, forbear to divulge," from Old French conceler "to hide, conceal, dissimulate," from Latin concelare "to hide," from con-, here perhaps an intensive prefix (see con-), + celare "to hide" (from PIE root *kel- (1) "to cover, conceal, save"). From early 15c. as "to hide or shield from observation." Replaced Old English deagan. Related: Concealed; concealing; concealable.