What is the unstressed vowel in word sentence?

The unstressed vowel in the word "sentence" is the "e" at the end of the word.

Here's why:

* Stress: The stress in the word "sentence" falls on the first syllable "sen". This means that the "e" at the end receives very little emphasis.

* Pronunciation: The "e" at the end of "sentence" is a "schwa" sound, which is represented by the symbol ə. This sound is very common in unstressed syllables in English.