IPA: /juˈniːzɪnəs/
KK: /juˈniːzɪnəs/
A feeling of worry or discomfort about something that may happen.
She felt a sense of uneasiness before the big presentation.
Uneasiness → It is formed from "un-" (meaning not) and "ease" (from Old French *aise*, meaning comfort or freedom from pain) and the suffix "-ness" (meaning the state of being). The word "uneasiness" describes the state of not being at ease or comfortable.
Think of 'not' ('un-') being comfortable ('ease') — that's why uneasiness means the state of feeling uncomfortable.