also: きー・ほるだー
keychain; key holder
A small chain or ring for holding keys, often with a decorative charm. Wasei-eigo from 'key holder'.
wasei-eigo (Japanese-coined English), from key holder
I bought a keychain as a souvenir from my trip.
I attach a keychain so I don't lose my keys.
Technical term in cryptography for a storage file or container holding encryption keys. Domain-specific use.
In PGP, public keys are stored in a key ring.
I attached a keychain to my keys.
I bought a keychain of my favorite character.