1. to make someone feel nervous, worried, or upset; to disturb someone’s confidence or composure
Usage: third person singular present tense of ‘unnerve’

Examples

• The strange noise in the attic unnerves her every night.
• His intense stare unnerves most people during interviews.
• The thought of speaking in public always unnerves him.
• The eerie silence in the empty house unnerves visitors.
• It unnerves me when someone stands too close behind me.
• The way she stares without blinking really unnerves everyone.