hm

/həm/
interjection
  1. Used to express thinking, hesitation, or mild doubt.
    • Hm, I'm not sure if that's the right answer.
    • Hm, let me think about that for a moment.
    • Hm, that's an interesting idea.
  2. Used to show that you are listening or paying attention.
    • Hm, I see what you mean.
    • Hm, go on, I'm listening.
    • Hm, yes, that makes sense.