A hypothetical or rare agent noun; one who calms or soothes.
Constructed from 'calm' with agential suffix '-ier' and comparative '-er', this appears to be an extremely rare or non-standard formation in English.
This word barely exists in modern English, but it shows how people in past centuries tried to build words systematically—'calmierer' should mean 'one who calms,' yet English speakers just say 'calmer' instead.
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