unsettled
verb
Meaning
To make upset or uncomfortable
"Don't unsettle the horses or they'll bolt."
To bring into disorder or disarray
adjective
Meaning
Disturbed, upset.
"I was unsettled by the sudden outburst, and since I didn't know what to do I just stood there, confused."
Not in a steady condition, uncertain, subject to change.
Not populated, having no settlers or other inhabitants.
Unpaid.
"We need to settle this bill; even if you think the charge is too high we can't just leave it unsettled."