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’.