na-adjective, noun
laxity; negligence
Describes a state of being careless, slack, or neglectful in duty or attitude. Often used in formal or critical contexts.
彼の緩怠な仕事ぶりが問題になった。
His lax work attitude became a problem.
安全管理に緩怠があってはならない。
There must be no negligence in safety management.