Someone or something that drowns another person or animal; a person who causes drowning or who is involved in a drowning incident.
From 'drown' plus -er (agent suffix meaning 'one who' or 'that which'). While grammatically formed, this word is quite rare in modern English.
This is a grammatically perfect English word formation (verb + -er = agent noun) that is almost never used because we have less harsh alternatives like 'person responsible for drowning'—showing how modern language avoids blame!
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