Overheard

He overheard the conversation by accident.

I overheard their mockery.

They feared being overheard.

Tom overheard Mary talking about him.

They were afraid of being overheard.

Your daughter overheard us talking.

Tom overheard us.

I overheard an Italian say that the German language is unsingable; maybe that's why almost no Italian opera singer sings in German.

I overheard Tom and Mary talking.

I overheard your conversation with Tom.