前缀acro- 来源于拉丁语akro-,akro-来源于akros意思是“at the end,at the top”，也就是说，akros一直演变成前缀acro-意思基本上没有变。为什么变成acro-，而不是演变成别的词缀呢？这个可以通过音变规律找到答案，c-k发音/k/，二者发生了音变。前后缀在元音前变成了acr-，有的书籍上叫把这个叫做acro-的音变。
A tip, height, or extremity.
[Greek akron, a tip or summit.]
An acrobat (Greek bainein, to walk) is literally someone who walks on tiptoe; an acropolis (Greek polis, city) was a fortified part of an ancient Greek city, typically on a hill; an acronym (Greek onuma,name) is a word formed from the initial letters of a phrase.
In medicine, the acromion is the outward end of the spine of the shoulder blade. Medical conditions include acromegaly (Greek megas, great), abnormal growth of the extremities and face caused by excessive production of growth hormone, and acrophobia, extreme or irrational fear of heights.
Some words that look as though they include this prefix actually contain Latin acer, pungent or acrid: acrolein, a sharp-smelling liquid; acrimonious, of an angry or bitter exchange.