lubricant

Từ điển Oxford Advanced Learner 8th

lu·bri·cant [lubricant lubricants] BrE [ˈluːbrɪkənt] NAmE [ˈluːbrɪkənt] (also informal lube BrE [luːb] ; NAmE [luːb] ) noun uncountable, countable
a substance, for example oil, that you put on surfaces or parts of a machine so that they move easily and smoothly

Word Origin:
early 19th cent.: from Latin lubricant- ‘making slippery’, from the verb lubricare, from lubricus ‘slippery’.

• Từ đồng nghĩa / Synonyms:
  lubricator, lubricating substance, lube