見境

プログレッシブ和英中辞典(第4版)

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.

出典　小学館「プログレッシブ和英中辞典(第4版)」