How did uhn-uh come to mean “no” and uh-huh come to mean “yes” in English?

Question

Pretty much the title. Also curious if other languages have similar non-word sounds for negation/affirmation.

In: Other

Answer 1

Generally speaking, it’s not so much the word said as it is the inflection at the end. Pitch goes up, that’s a yes. Pitch goes down, that’s a no.