The expression "mhm" is typically used in conversation as a sound that indicates agreement, acknowledgment, or that someone is listening. It can convey various emotions depending on the context, ranging from enthusiasm to uncertainty or even indifference. It's often used informally in spoken language rather than in writing.
The expression "mhm" does not have a formal etymology as it is an informal sound rather than a standard word. It likely developed as a vocal expression derived from the need to convey agreement or acknowledgment in casual conversation.
Person A: "Do you want to go to the movies tonight?"
Person B: "Mhm, that sounds great!"
Person A: "I think we need to revise our project strategy."
Person B: "Mhm, I agree with that."
Person A: "Did you understand the assignment?"
Person B: "Mhm, I think I got it."
Person A: "I heard it might rain tomorrow."
Person B: "Mhm, I've heard that too."
Person A: "Are you coming to the party?"
Person B: "Mhm, I'll be there!"