IPA: //ʌnˈsɛt.əld//
KK: /ʌnˈsɛtld/
Not stable or calm; likely to change or not yet decided.
The weather has been quite unsettled this week, with sudden storms and sunshine.
Comparative: more unsettled
Superlative: most unsettled
Unsettled → It is formed from "un-" (meaning not) and "settled" (from Old English "setlan", meaning to place or establish). The word "unsettled" means not established or in a state of disorder.
Think of something that is 'not placed' or 'not established' — 'un-' means not, and 'settled' refers to being placed or established.