eavesdrop

This term carries a strong connotation of stealth and intrusion, implying a breach of privacy. It suggests a deliberate effort to remain hidden or unnoticed while gathering information that was not intended for the listener's ears. Historically, the word derives from the architectural "eaves-drop," referring to the area where water drips from the eaves of a roof. The image is of someone standing physically beneath the roofline of a house to lean in and hear what is happening inside.