IPA: /ˈwɪntərˌɡriːn/
KK: /ˈwɪntərˌɡrin/
A type of low-growing plant that stays green all year, known for its aromatic leaves and red berries. It often has white flowers and is found in North America. The leaves can be used to make a flavoring or oil.
We picked wintergreen leaves to make a refreshing tea.
Wintergreen is formed from "winter" (from Old English *winter*, meaning the cold season) and "green" (from Old English *grene*, meaning the color of growing plants). The word "wintergreen" refers to plants that remain green throughout the winter season.
Think of the cold season ('winter') and how some plants stay 'green' even then — that's what wintergreen means.