The lazy boy stood idly by as the rest of his siblings helped unload the groceries from the car.

People were shocked that the fireman sat idly by and watched the house go up in flames without offering assistance.

I spent my day idly watching reruns and never got any important housework finished.

Idly twiddling his thumbs, the bored contractor sat on his truck bed waiting the others to show up.

Because she hates to sit idly, the busy secretary always finds something to do in her down time.