IPA: /ˌʌn.rɪˈlækst/
KK: /ʌnˈrɪlækst/
Not feeling calm or at ease; tense or anxious.
After a long day at work, I felt unrelaxed and needed some time to unwind.
Unrelaxed → It is formed from "un-" (meaning not) and "relaxed" (from Latin "relaxare", meaning to loosen or make less tense). The word "unrelaxed" means not loosened or not at ease.
Think of 'not' ('un-') being added to 'loosened' ('relaxed') — that's why unrelaxed means not at ease.