1. to make someone feel anxious, confused, or disturbed
2. to make something unstable or cause it to move from its position

Examples

• The strange noise in the attic unsettles me every night.
• Bad news from work always unsettles her concentration.
• The earthquake unsettles the books on the shelf.
• His unpredictable behavior unsettles his coworkers.
• The wind unsettles the leaves on the tree.
• That horror movie really unsettles young children.
• The construction noise unsettles the dust in the old building.