τὰ ἀφανῆ τοῖς φανεροῖς τεκμαίρου → analyze the unknown based on the known
northern: Ar. and P. βόρειος, V. βορραῖος, πρόσβορρος.
the Arctic Regions, the North: P. and V. ἄρκτος, ἡ.
cold: P. and V. ψυχρός.
