whim

She was distraught and sad walking through a park on Long Island when she joined a drum circle on a whim.

There are no lifeless spots in his works; every whim of his takes shape, as if by sorcery, in splendid figures.

But he has told me I have reason for the whim, and that I should continue.

It was partly a despairing woman's whim, an absurdity, and partly she was prompted by her magic practices to take the cloth.

And upon your whim likewise depends the special forcemeat used.

Such secret provisions have often been agreed to simply upon the whim or the ambition or the likes and dislikes of the rulers.