per ‧ turbed /pəˈtɜːbd $ pərˈtɜːrbd/ BrE AmE adjective formal
[ Date: 1300-1400 ; Language: Old French ; Origin: perturber , from Latin perturbare ]
worried about something that has happened or will happen:
William looked a little perturbed.
perturbed by/at/about
He didn’t seem perturbed by the noises outside.
perturbed that
He was perturbed that she didn’t look happy.
—perturb verb [transitive] :
My unexpected arrival didn’t perturb him in the least.