adj. 1. Far north; Arctic 2. Very cold; frigid
synonyms: freezing, Siberian, wintry
antonyms: mild, heated, temperate
The scientist was relocated to the Arctic in order to work in optimal research conditions, but she had a difficult time adjusting to the hyperborean setting.
In The Revenant, the main character is largely exposed to the hyperborean Winter after being abandoned by his group of animal trappers.
Boiling water & water gun in extreme cold (Northern Ontario)