プログレッシブ和英中辞典(第4版)の解説
みさかい【見境】
distinction
見境がつかない
cannot distinguish [discriminate] ((A from B, between A and B))
見境なく
〔無差別に〕without discrimination／indiscriminately／〔無思慮に〕imprudently／indiscreetly
見境がなくなる
forget oneself
なんの見境もなく奥さんにしゃべってしまうとは
How imprudent [indiscreet] of him to mention it to his wife!
前後の見境もなく辞表をたたきつけた
He at once sent in his resignation without thinking of the consequences.