Plural of complimenter; multiple people who give compliments.
From 'complimenter' (compliment + '-er') + '-s' (regular English plural marker). This is a straightforward plural formation with no special etymology.
The plural '-s' is the most basic pluralization in English, but its history is fascinating—it comes from Old English '-es,' and over centuries it became the default, swallowing up older irregular plurals.
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