極(きわ)まるto reach an extreme, to reach a limit, to terminate, to come to an end, extremely, to be stuck, to be in a dilemma, to be at a loss, to be decided, to be settled

辞書の定義

一般的

五段活用（ラ行）, 自動詞
1. 1.
  EN to reach an extreme, to reach a limit, to terminate, to come to an end
補助動詞, 名詞・動詞の連体形, 五段活用（ラ行）
1. 2.
  EN extremely
  after adjectival noun. e.g. 退屈極まる話
五段活用（ラ行）, 自動詞
1. 3.
  EN to be stuck, to be in a dilemma, to be at a loss
  esp. 窮まる. occ. 谷まる
2. 4.
  EN to be decided, to be settled