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English Vocabulary: hmm, huh, ouch, wow, aww, uhh…
How Do You Spell Interjections Used in Dialogue - The Editor's Blog
What to call words like uh, um, uh-huh, hmm - WordReference …
Minimal Responses: How to spell noises like "Mm-hmm" and "Uh …
Dictionary of Interjections (aww, oh, ah, eek, oops)
Hm, hmm, hmmm, mm-hmm, mm, mmm (guide to use in …
English Vocabulary: hmm, huh, ouch, wow, aww, uhh ... - engVid
100 Mostly Small But Expressive Interjections - Daily Writing Tips
The origin of 'hmm' - English Language & Usage Stack Exchange
Is 'hmmm?' an interjection? If not, what is it?