godan verb (-ku), intransitive verb
become rusted together; become rusted shut
Describes metal parts that have rusted and stuck together or become immovable.
長い間使わなかったので、ネジが錆び付いて回らなくなった。
The screw became rusted shut and won't turn because it wasn't used for a long time.
godan verb (-ku), intransitive verb
General rusting of metal objects; often implies a state of disuse or neglect.
雨ざらしにしていた自転車がすっかり錆び付いてしまった。
The bicycle I left out in the rain has become completely rusty.
godan verb (-ku), intransitive verb
become rusty (skill); become less effective
Figurative use for skills or abilities that have declined due to lack of practice.
しばらく英語を使っていなかったので、会話力が錆び付いてしまった。
I haven't used English for a while, so my speaking ability has become rusty.