IPA: //ʌnˈsɛt.əld.nəs//
KK: /ʌnˈsɛtldnəs/
The state of feeling anxious or disturbed, often due to uncertainty or instability.
Her unsettledness made it difficult for her to focus on her work.
Unsettledness → It is formed from "un-" (meaning not) and "settled" (from Old English "setlan", meaning to place or establish) and the suffix "-ness" (meaning the state of). The word "unsettledness" refers to the state of not being established or stable.
Think of 'not' ('un-') being combined with 'established' ('settled') to describe a state of instability or lack of peace.