In conversational American English, several variations on
"No" are commonly heard:

Hm-umm

It's difficult to show the pronunciation of this variation by
using normal writing. It's made with the mouth closed, and
the vowel is nasal (made through the nose). There's a glottal
stop (a kind of "catch" in the throat) between the two parts.

Note: The first "h" is important. If the "h" is not pronounced
at the beginning of the first syllable but is pronounced at
the beginning of the second syllable, people will understand
"Yes," not "No."

Huh-uh, Uh-uh

These variations are also difficult to show with normal
writing. They're made with the mouth slightly open.
The vowels are also nasal, and there's also a glottal stop
between the parts.

Nope

This variation is very casual. It rhymes with "hope."

Nah

This variation is even more casual. It's pronounced "naeh";
the vowel is the same as the vowel in "hat" or "nap."

_________________________________________________

Special Notes: