Wary

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late 15th century: from ware2 + -y1.

wiktionary

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From the adjective ware +‎ -y.

etymonline

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wary (adj.)

late 15c., with -y (2) + ware, from Old English wær "prudent, aware, alert, wary," from Proto-Germanic *waraz (source also of Old Norse varr "attentive," Gothic wars "cautious," Old Saxon giwar, Middle Dutch gheware, Old High German giwar, German gewahr "aware"), from PIE root *wer- (3) "perceive, watch out for." Related: Warily; wariness.