Dictionary
dis•con•cert
Pronunciation: (dis"kun-sûrt'), [key]—
v.t.
1. to disturb the self-possession of; perturb; ruffle:
Her angry reply disconcerted me completely.
2. to throw into disorder or confusion; disarrange:
He changed his mind and disconcerted everybody's plans. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.