One who daunts or intimidates; something that discourages or frightens.
From 'daunt' plus the agent noun suffix '-er.' This creates a word for a person or thing that causes intimidation or discouragement.
Agent nouns with '-er' can apply to people, animals, or abstract forces—'daunter' could describe a person, a rival team, or even a challenge, showing how flexible English nominalizations really are.
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