disconcert

verb

Disturb the composure of; unsettle.

SYNONYMS

abashagitatebafflebewildercause to be at a standconfusediscombobulatediscomfitdiscomposediscountenancedismaydisorientdistractdisturbembarrassfazeflustergravelnonplusperplexperturbpsych output out of countenancerattleruffleshakestartlestop someone in their trackssurprisetake abacktake by surprisethrowthrow/catch off balanceunnerveunsettleupsetworry