衝動 in English:

I felt an impulse to cry out loud.

He told his wife not to buy on impulse.

A foolish impulse made me say what I should have left unsaid.

She bought the dress on impulse.

Men are rather reasoning than reasonable animals, for the most part governed by the impulse of passion.

Try not to buy anything on impulse today.

He fell prey to an impulse to steal.

Maybe the impulse was working upon her subconscious.

She was borne away by an impulse.

On impulse I wanted to hit him.

It was an impulse, but now I’m having second thoughts.

nerve impulses /electrical impulses

a sudden impulse to laugh

Don’t buy things on impulse.

I barely restrained the impulse to strike him.