One who praises excessively or flatters someone in an extreme, often insincere manner.
From 'belaud' (verb) plus '-er' (agent suffix that creates a noun describing someone who performs the action). This identifies the person doing the excessive praising.
The '-er' suffix is so fundamental that English speakers automatically understand 'belauder' means 'one who belauds,' even if they've never heard the word—it's a superpower of English word-building.
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