名詞 lubricant:

1. a substance capable of reducing friction by making surfaces smooth or slippery
   同義詞：lubricator, lubricating substance, lube

1. The sort of lubricant which we use depends largely on the running speed of the bearing.
   我們使用哪種潤(rùn)滑劑，主要取決于軸承的轉(zhuǎn)速如何。
2. A thick oil or viscous substance, especially when used as a lubricant.
   潤(rùn)滑油，滑油粘稠的油或粘性物質(zhì)，尤指用作潤(rùn)滑油的

lu.bri.cant

n.（名詞）
A substance, such as grease or oil, that reduces friction when applied as a surface coating to moving parts.
潤(rùn)滑劑：一種象油脂或汽油的物質(zhì)，被擦在運(yùn)動(dòng)部分表面時(shí)可減少摩擦
One that helps reduce difficulty or conflict.
調(diào)解人：有助于減少困難或沖突的人

【引伸】
lu.bricant
adj.（形容詞）