obvi
拉丁语 Latin阻挡，妨碍，相遇
关于此词根
The root obvi comes from Latin obvius, built from ob- ('in the way of, toward') + via ('road, way' — the same via you see in viaduct, deviate, and 'via email'). The literal picture is striking: something obvius is 'lying right in your road,' standing directly in your path as you walk.
Think about what that means. If a thing is sitting in the middle of the road in front of you, you cannot miss it. You don't have to search, squint, or be told — it is simply there, blocking the way, impossible to overlook. That is exactly how the meaning of obvious evolved: from 'in the path' to 'plain to see, self-evident.' The most everyday word in the family carries a 2,000-year-old image of an object planted in the road.
The same 'in the road' image runs through the small family in two directions:
- obvious / obviously: what stands in your path is plain to see → easily perceived, clearly true.
- obviate: ob- + via originally meant 'to go to meet, to block on the road.' To obviate a difficulty is to step out and meet a problem on the road before it reaches you — to head it off, clearing the way so the trouble never arrives. To obviate the need for something is to make it unnecessary by removing the obstacle in advance.
So the root has a quiet double life: when something is in your road and you see it, it's obvious; when you go out to meet trouble on the road and remove it, you obviate it. Both come from the same image of a path and what lies across it.
obvi = ob-（挡道）+ via（路）。想象路中央放着一块石头：你不可能看不见它（obvious），而聪明的旅人会提前把它搬开，免得绊倒别人（obviate）。
核心词深度解析
挑出这个词族里最值得讲透的几个词，逐个还原它的来历。
一个藏着古老画面的日常词。ob-（挡道）+ via（路）= “躺在你路上的”。横在你面前路上的东西不可能被忽略——这正是 obvious 的含义：明显到无需寻找、无需解释。下次说某事 obvious，其实就是在说它“正横在路当中”。
词族中令人意外、也更难用的成员。ob- + via 最初意为“到路上迎击、拦截”。obviate a problem 是在路上迎击问题、在它到来前将其化解；obviate the need for something 是通过提前清除障碍，使某物变得不必要。注意：obviate 的宾语是 need、difficulty、problem（需求、困难、问题），而非你真正想要的东西。