The kanji 極 primarily conveys the idea of "extreme," "utmost," "limit," or "to reach the limit." It implies the highest degree, the furthest extent, or the very end of something. It can also signify a point of polarity, such as the North or South Pole.

・On-yomi (音読み): キョク (kyoku) ・Kun-yomi (訓読み): きわ(める) (kiwa(meru): to investigate thoroughly, to exhaust; to carry out) , きわ(まる) (kiwa(maru): to be at an extreme, to reach the limit)

⚫︎ 極限（きょくげん） Translation: Extreme limit; utmost; the ultimate ⚫︎ 北極（ほっきょく） Translation: North Pole ⚫︎ 極める（きわめる） Translation: To master; to perfect; to investigate thoroughly (using the kun-yomi reading)