/ ˈhɑːdi; NAmE ˈhɑːrdi/ adjective ( har·dier , har·di·est )
1.
strong and able to survive difficult conditions and bad weather :
a hardy breed of sheep
2.
( of a plant ) that can live outside through the winter
► hardi·ness noun [ U ]
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WORD ORIGIN
Middle English (in the sense bold, daring ): from Old French hardi , past participle of hardir become bold, of Germanic origin; related to hard .