IPA: /ˈnɒkə/
KK: /ˈnɑkər/
A device, often made of metal, that is attached to a door and used to knock on it to get someone's attention.
She used the knocker to announce her arrival at the front door.
Knocker → The word 'knocker' originates from the Old English 'cnocca', meaning a person or thing that knocks. It refers specifically to a device used to knock on a door.
Think of a 'knocker' as something that 'knocks' on a door, which helps you remember its purpose.