flighty

A most flighty beast he was—nerves all gone—I dare say a hopeless neurasthenic.

"Ethel is a vain, flighty woman," Marlow said, in reply to his wife's remark.

You're growing old and forgetful, so don't get foolish and flighty.

“You are a dear, ignorant, flighty young gentleman,” she said.

He found her remarkably bright and sensible and not at all "flighty."

Suppose they say of you what they say of her, that you are a frivolous, flighty woman?

No, he would think it the most natural thing in the world for her to be so flighty.

But one was a little too old, and another was a good deal too flighty.

But I am not so flighty as to imagine you will pay any heed.

You and I are to keep house and look after these flighty young folks, I understand.