Level 5 · word 11,410 of 20,000

lubricate

/ˈluːbrɪˌkeɪt/ American
  • v. 使润滑, 上油
Definition
  • v. to put oil or grease on something so it moves smoothly
Example
You should lubricate the bicycle chain to stop it from squeaking.
你应该给自行车链条上点润滑油,免得它吱吱响。