IPA: /ˈθɔːləs/
KK: /θɔːləs/
Describing something that remains permanently frozen and does not melt or become liquid.
The scientists discovered a thawless region in Antarctica where the ice never melts.
Thawless is formed from "thaw" (from Old English *þawian*, meaning to become liquid or melt) and "-less" (meaning without). The word "thawless" means without thawing or not melting.
Think of something that does not 'melt' or 'become liquid' — 'thaw' means to melt, and '-less' means without.