lubricant

noun
🔊/ˈluːbrɪkənt/
🔊/ˈluːbrɪkənt/
(also informal lube
🔊/luːb/
🔊/luːb/
)
[uncountable, countable]
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  1. a substance, for example oil, that you put on surfaces or parts of a machine so that they move easily and smoothly润滑剂;润滑油
    Word Originearly 19th cent.: from Latin lubricant- ‘making slippery’, from the verb lubricare, from lubricus ‘slippery’.