whim

That suggestion was no whim of the moment.

she bought it on a whim .

It was a privilege revokable at any time on whim of the authorities.

our whims have brought us to the brink of biocide.

the follies and whim-whams of the metropolis.

Everyone was entirely subject to the whim of the Sultan.

He flew into a whim and went swimming on a cold winter day, and got a fever soon afterwards.

Don't underdo it.This doesn't mean you just sit whenever the whim strikes you.It means you set up a practice schedule and keep to it with a gentle, patient tenacity.