IPA: /ˌɪn.hoʊ.məˈdʒɛn.ɪ.ti/
KK: /ɪnhoʊməˈdʒɛnɪti/
The state of being made up of different or varied parts, rather than being uniform or the same throughout.
The inhomogeneity of the material made it difficult to predict its behavior under stress.
Inhomogeneity → It is formed from "in-" (meaning not) and "homogeneus" (from Greek "homogenes", meaning of the same kind). The word describes a state of being not of the same kind or uniformity.
Think of 'not' ('in-') being mixed with 'the same kind' ('homogeneus') — that's why inhomogeneity means a lack of uniformity.