If you look at it long enough, it is a word that opens and spreads out, makes a circle of a far horizon, a word on which rain can fall and dimple or sweep across in lashing gusts and leave unperturbed, a word that is calm enough to look at, almost lulling, but also hints at holding unreckonable power."

VOA: standard.2010.08.04

And this dimple is later forming a vesicle, a round ball, that goes on and forms the ear.

随后形成一个圆球状的泡囊，直至发育成耳朵。

斯坦福公开课 - 7个颠覆你思想的演讲课程节选