Hmm vs. Umm

Hmm vs. Umm — Is There a Difference?
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Difference Between Hmm and Umm

Hmminterjection

Indicating thinking or pondering.

Hmm... that's an interesting idea.Hmm... I just can't decide between the two.

Umminterjunction

Used to express doubt or uncertainty or to fill a pause when hesitating in speaking.

Hmminterjection

A demand for an answer to a question.

Just where were you until 2 a.m.? Hmm?

Umminterjection

Interjection implying hesitation; see um.

- How does a plane fly?- Umm, I don't know.

Hmmverb

(intransitive) To make a thoughtful humming noise.

Ummverb

To make the umm sound to express confusion or hesitancy.

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