noun
extreme north; North Pole
Refers to the far northern region, often in geographical or climatic contexts. Can specifically mean the North Pole.
その探検隊は極北の地を目指した。
The expedition headed for the extreme north.
極北の寒さは想像を絶する。
The cold of the far north is beyond imagination.
noun
utmost limit; breaking point
Figurative use for the extreme limit of something, such as patience, endurance, or a situation. Often used in phrases like 極北に達する.
彼の忍耐も極北に達した。
His patience reached its breaking point.