極める
1
to carry to extremes;to go to the end of something;to reach the limits of something
2
to reach the peak of something (e.g. luxury, hardships, etc);to be extremely (e.g. busy)
多くの運動選手は青年時代に盛りを極める。
Most athletes are at their best during their early manhood.
3
only applies to
極める
to exhaust completely;to have nothing left (e.g. to say)
Other forms
窮める 【きわめる】 (rarely used kanji form)