*lubricate*

v. t. [ L. lubricatus, p. p. of lubricare to lubricate. See Lubric. ] 1. To make smooth or slippery; as, mucilaginous and saponaceous remedies lubricate the parts to which they are applied. S. Sharp. [ 1913 Webster ]

Supples, lubricates, and keeps in play,
The various movements of this nice machine. Young. [ 1913 Webster ]

2. To apply a lubricant to, as oil or tallow. [ 1913 Webster ]

3. Hence: To reduce social frictions or difficulties between people, thus making cooperation easier and joint action smoother. [ PJC ]

4. To inebriate by supplying with alcoholic beverages. [ slang ] [ PJC ]