潤滑油
Common
Noun
1
noun (common) (futsuumeishi)
lubricating oil;lubricant;lube
お茶は仕事をスムーズに運ばせるための潤滑油のようなもの。
Tea is like the lubricating oil of work to allow it to proceed smoothly.
2
noun (common) (futsuumeishi)
person or thing that makes things run smoothly;facilitator