What's the adjective for winterbourne? Here's the word you're looking for.
Included below are past participle and present participle forms for the
verbs winter, winterize, winterise and winterproof which may be used as adjectives within certain contexts.
“And, having murdered sleep through killing a king, Hicks shoots his wife the wintriest of smiles when she later recommends a good night's kip.”
“And in this wintriest of summer towns, tourists are invited to abandon their warm-weather pursuits and watch.”
“From the window, instead of people going off to work and school, there was a stream of people going the other way, toward Hampstead Heath, wrapped in all their wintriest clothes carrying every kind of makeshift sledge.”