IPA: /ʌnˈwɛðəd/
KK: /ʌnˈwɛðərd/
Not affected by the weather; not worn or changed by exposure to the elements.
The unweathered stone looked fresh and new, unlike the others that had been exposed to the rain and sun.
Unweathered → It is formed from "un-" (meaning not) and "weathered" (from Old English "weder", meaning weather or atmosphere). The word "unweathered" means not affected or altered by the weather.
Think of 'not' ('un-') being added to 'weathered', which refers to something that has been changed by the weather. This helps you remember that 'unweathered' means something that has not been changed by the weather.