He also uses lays as a noun meaning "not-being.

He also uses lays as a noun meaning "not-being." Like anniyya and huwiyya , the neologism ays can refer to a particular existent, with lays meaning a non-being (this usage appears repeatedly in a long passage to be examined below, FP 123.3-124.16 [RJ 41.3-43.7]). But like anniyya and huwiyya , ays can also signify being abstractly considered; as we will see below, for al-Kindi a thing can go from lays , non-being, to ays , being. 16 Previous…