等閑

(1)failure to act with the prudence that a reasonable person would exercise under the same circumstances

(2)道理をわきまえた人が同じ状況下で行う思慮のない行動

(3)the trait of neglecting responsibilities and lacking concern

(4)責任を怠り、懸念が欠如している特徴

(5)lack of attention and due care

(6)注意や当然と思われる関心が欠如していること