IPA: //trænˈspoʊlər//
KK: /trænˈspoʊlər/
Relating to or extending across the polar regions of the Earth.
The transpolar route is often used by ships navigating through icy waters.
Transpolar → It is formed from "trans-" (meaning across) and "polar" (from Latin "polaris", meaning of or relating to the poles). The word "transpolar" refers to something that crosses or relates to the polar regions.
Think of something that goes 'across' ('trans-') the 'poles' ('polar') — that's why transpolar means relating to or crossing the polar areas.