* Glaze can refer to a smooth, shiny coating on pottery or the glassy coating on windows.
* Glaze can also mean to look at something with a fixed stare, similar to the way you might look at something through glass.
* Glaze can also mean to become dull or lifeless, which relates to the feeling of an ache.
While "glass" and "ache" are pronounced differently, "glaze" can be pronounced like both words depending on its usage.