[run4 hua2] /smooth/oily/sleek/to lubricate/
  [run4 hua2] /einfetten (u.E.) (V)/
  [run4 hua2] /lubrifier/graisser/
 [じゅんかつ] /(adj-na,n) smoothness/lubrication/EntL1635800X/
Visszatérés a(z) „潤滑” laphoz.