Eavesdropping [verb]

I thought she had come to her right senses, at last, and was making the shift to break off the eavesdropping.

He persists, then sees his mother in private, kills a courtier who was eavesdropping, and convicts his mother of her sin.

Relieved, yet ashamed of his eavesdropping, he ran down the road toward his home.

Paul had heard of people who actually deemed eavesdropping unbecoming!

It was secure from any but forcible entrance, and eavesdropping from outside would be worse than useless.

We both stood fastened on that scene in another world, guiltless of eavesdropping.

She was ashamed of the thrill, and ashamed (because suddenly awakened to the realization) that she was eavesdropping.

Eavesdropping on the train was perfectly justifiable, she told her uneasy conscience, because there was no personal element in it.

It was just after she had confessed to the unconscious eavesdropping that made her a hearer of that song.

But she could make out nothing distinctly, and then she flushed hotly to think that she had been tempted to eavesdropping.