com·​ment·​er | \ˈkä-ˌmen-tər \
variants: or less commonly commentor
plural commenters or commentors

Definition of commenter 

: one who comments especially : one who leaves a comment on an Internet site, story, page, etc. … every blogger and commenter and self-anointed pundit, could outperform any robot writer at a fraction of the cost. — Paul Di Filippo Many websites which allow users to leave comments … use a system called Captcha to check that the commenter is not a computer programme (or 'bot') leaving spam comments. — Nick Poyntz

First Known Use of commenter

14th century, in the meaning defined above

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The first known use of commenter was in the 14th century

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More from Merriam-Webster on commenter

Nglish: Translation of commenter for Spanish Speakers

Britannica English: Translation of commenter for Arabic Speakers

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playful or foolish behavior

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