無なげ

na-adjective

casual; offhand; as if nothing

Describes a manner or attitude that is casual, unconcerned, or as if something doesn't exist or matter. Often used adverbially with に.

• 彼かれは無なげに質しつ問もんに答こたえた。

  He answered the question offhandedly.

• 彼かの女じょは無なげな様よう子すで部屋へやを出でていった。

  She left the room with a casual air.