IPA: /ɪnˌsɛpəˈrɪbɪlɪti/
KK: /ɪnˌsɛpəˈrəbɪlɪti/
The state of being unable to be separated or divided from something else.
The inseparability of their friendship was evident to everyone around them.
Inseparability → It is formed from "in-" (meaning not), "separare" (meaning to separate), and "-ability" (meaning the quality of being able to). The word refers to the quality of not being able to be separated.
Think of 'not' ('in-') being able to 'separate' ('separare') something — that's why inseparability means the quality of being unable to be separated.