IPA: /ʌnˈbɜrnd/
KK: /ʌnˈbɜrnd/
Not having been burned or scorched.
The unburned area of the forest remained green and healthy after the fire.
Unburned → It is formed from the prefix "un-" (meaning not) and the root "burn" (from Old English "byrnan", meaning to consume with fire). The word "unburned" means not consumed by fire or not burned.
Think of 'not' ('un-') being added to 'burn' — so unburned means something that has not been consumed by fire.