unlubricated
/ʌnˈlubrəˌkeɪtɪd/
adjective
- Not having a lubricant (such as oil or grease) applied to reduce friction.
- Running an unlubricated engine can cause serious damage.
- He tried to open the unlubricated lock, but it wouldn't budge.
- The unlubricated chain on the bicycle made a loud squeaking noise.
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