hmm

/hmฬฉ/

IPA: /HH AH0 M/

verb
  1. 1

    To make a thoughtful humming noise.

interjection
  1. 1

    Indicating thinking or pondering.

    โ€œHmm... I just can't decide between the two.โ€

  2. 2

    A demand for an answer to a question.

    โ€œJust where were you until 2 a.m.? Hmm?โ€

Synonyms

Source: https://en.wiktionary.org/wiki/hmm