IPA: /ˈkɒmɛntə/
KK: /ˈkɑːmɛntər/
A person who gives their opinion or feedback, usually in writing, on something such as a post, article, or video.
The commenter shared their thoughts on the blog post about climate change.
Commenter → It is formed from "comment" (from Old French *comenter*, meaning to explain or interpret) and "-er" (meaning a person who). A commenter is a person who explains or provides commentary on something.
Think of someone who provides an 'explanation' ('comment') — and the '-er' just means a person. A commenter is someone who explains or shares thoughts.