Other forms: commented, comments, commenting
A comment is a short remark giving an opinion. A sentence, dropped into the conversation.
It takes on or about. The word has grown enormously with the internet, since the comments below an article are now a genre in their own right, and never read the comments is standard advice. Journalism uses it as a formal category, since a request for comment is what a reporter sends before publishing, and no comment is the refusal. Programming has comments too, which are notes for humans that the computer ignores.
Proto-Indo-European
*men-
Latin
commentum — comment, interpretation
Old French
coment — commentary
Middle English
coment
English, today
comment
From Middle English coment, comment, from Old French coment (“commentary”), from Latin commentum (“comment, interpretation”), from Classical Latin commentum (“invention, fabrication”).
Etymology from Wiktionary, CC BY-SA