without paying any attention; without giving a thought; heedless of
Used adverbially to describe doing something while completely ignoring or not caring about something else. Often appears in written narrative or formal speech.
See also: 気に留める
He went his own way, paying no heed to the criticism around him.
She dashed outside without even noticing that it was raining.
Standard kanji-kana spelling for this phrase.
Kana spelling of the verb part; common in casual writing.
From 気 (mind, attention) + に (particle) + も (even) + 留めず (negative continuative of 留める 'to stop, to fix'). Literally 'without even fixing one's mind on'.