Frozen and Hyperborean

Frozen adjective - Firmly positioned in place and difficult to dislodge.

Hyperborean and frozen are semantically related In some cases you can use "Hyperborean" instead the word "Frozen" as an adverb or an adjective.

Hyperborean noun - (Greek mythology) one of a people that the ancient Greeks believed lived in a warm and sunny land north of the source of the north wind.

Frozen and Hyperborean are semantically related in cold topic. You can use "Frozen" instead the word "Hyperborean" as an adverb or an adjective, if it concerns topics such as chilly, toward the top pole of the earth.