lubricate
verb (used with object)
to apply some oily or greasy substance to (a machine, parts of a mechanism, etc.) in order to diminish friction; oil or grease (something).
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
"Is it a lubricatory or a fueling mechanism?"
From The Ego Machine by Henry Kuttner