Today's word

hyperborean /ˌhī-pər-ˈbȯr-ē-ən, -(ˌ)pər-bə-ˈrē-ən/ - 1. of or relating to an extreme northern region : frozen  2. of or relating to any of the arctic peoples

Pretty sure I've encountered this word before. Will likely not remember it the next time, either, unless the context gives it away.