lack of prudence; poor judgment
Refers to a person's lack of careful thought, discretion, or sound judgment. Often used in expressions like 心無しの行動 (thoughtless action).
His thoughtless remark hurt everyone.
Imprudent actions sometimes cause big problems.
uneasy; restless; restive
Standard kanji spelling for this noun.
Alternate kanji spelling using な instead of 無; less common but attested.
Compound of 心 (heart, mind) and 無し (without), literally 'without heart/mind', used to indicate lack of thoughtful consideration.