disconcert

VERB /,dɪskən'sɜrt/
10 LETTERS · 3 SYLLABLES · STARTS WITH D

disconcert is a valid 10-letter word worth 15 points in Scrabble and 18 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
D2I1S1C3O1N1C3E1R1T1
2 + 1 + 1 + 3 + 1 + 1 + 3 + 1 + 1 + 1 =15 PTS
DOUBLE WORD → 30TRIPLE WORD → 45
MEANING

What does disconcert mean?