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