IPA: /əˈsɛntər/
KK: /əˈsɛntər/
A person who agrees or gives approval, especially in a formal context such as voting or elections.
The assentor raised their hand to show support for the candidate during the election.
Assentor is formed from "ad-" (meaning to) and "sentire" (meaning to feel or perceive). The word refers to someone who agrees or gives approval, essentially meaning to feel or perceive in agreement with something.
Think of someone who 'feels' ('sentire') in agreement with another, as 'ad-' means to move towards or agree with.