What is the unstressed vowel in husband?

The unstressed vowel in "husband" is the "u" in the first syllable.

Here's why:

* Stress: The stress falls on the second syllable, "hus-band," making the "u" in the first syllable unstressed.

* Pronunciation: The unstressed "u" sound is reduced to a schwa sound, which is similar to the sound of the "a" in "about."

So, when you say "husband," the "u" sound is very short and almost disappears.