IPA: /ˈoʊvərˌwɪntər/
KK: /ˈoʊvərˌwɪntər/
Happening or existing during the winter season.
The overwinter crops need special care to survive the cold.
To spend the winter in a particular place or to survive through the winter season.
Many birds migrate to warmer areas to overwinter.
Past: overwintered
Past Participle: overwintered
Overwinter → It is formed from "over-" (meaning beyond or during) and "winter" (from Old English "winter", meaning the cold season). The word "overwinter" means to spend the winter in a particular place or to survive through the winter season.
Think of spending time 'beyond' ('over-') the cold season ('winter') — that's what overwinter means.
No commonly confused words.