Tundra
Etymology
From Russian "tundra," borrowed from Kildin Sami "tūndâr" ("treeless upland"). It is one of the few English words to come from a Sami language of the Arctic.
noun · /TUN-druh/
A vast, treeless Arctic or high-mountain plain where the subsoil stays permanently frozen.
What it names
The frozen, treeless biome of the far north — a specific climate zone, not just "cold wasteland."
Example
Caribou moved in slow herds across the open tundra.
Related idea
Tundra is cold and treeless because the ground stays frozen; a savanna is warm, open grassland where scattered trees do grow.