Meaning of disconcert

dis•con•cert

Pronunciation: (dis"kun-sûrt'), [key]

— v.t.

to disturb the self-possession of; perturb; ruffle: Her angry reply disconcerted me completely.
to throw into disorder or confusion; disarrange: He changed his mind and disconcerted everybody's plans.

See also:

Infoplease Tools

Video Library

A large collection of informational and educational videos from animals and landmarks to language arts and history.
Almanacs

A vast compendium of statistics and up-to-date facts and figures, on everything you need to know.
Dictionary

An unabridged dictionary from aalii to zymurgy, including a pronunciation guide.
Atlas

An atlas featuring maps and detailed profiles of all 193 countries and the 50 U.S. states.
Encyclopedia

A current and comprehensive encyclopedia covering all the major branches of knowledge from astrophysics to Zimbabwe.