IPA: /ˌʌn.səʊ.ʃəˈbɪl.ɪ.ti/
KK: /ʌnˈsoʊʃəˌbɪlɪti/
The condition of being unfriendly or not wanting to socialize with others.
His unsociability made it difficult for him to make friends at school.
Unsociability → It is formed from "un-" (meaning not) and "sociability" (from Latin "sociabilis", meaning able to be associated with others). The word "unsociability" means the quality of not being inclined to associate with others or being social.
Think of 'not' ('un-') being social or friendly ('sociability'). This helps you remember that unsociability refers to a lack of social inclination.