أن يتحيز بنفسه غير تابع تحيزه لتحيز شيء آخر
Its localization is not merely dependent upon the localization of another thing.
In this theological usage, taḥayyuz concerns being related to a spatial location. A body can move from one location to another. Its presence at a place does not thereby make it a property inhering in that place in the way a color inheres in a surface.
By contrast, a color is present in a bearer. Its relation to that bearer differs from a body's relation to where it happens to be. This prepares the distinction between an inhering attribute and its substratum.