disconcerting

UK: /ˌdɪskənˈsɜː^rtɪŋ/

Collins Concise English Dictionary © HarperCollins Publishers::

disconcerting / ˌdɪskənˈsɜːtɪŋ/ adjective

1. causing a feeling of disturbance, embarrassment, or confusion; perturbing; worrying

ˌdisconˈcertingly adverb

WordReference Random House Learner's Dictionary of American English © 2025

dis•con•cert /ˌdɪskənˈsɜrt/   v. [~ + object]

1. to disturb (a person's) self-possession, as by throwing into confusion:
   His constant shuffling of papers disconcerted me.

dis•con•cert•ed, adj. 
dis•con•cert•ing, adj. See -cert-.

WordReference Random House Unabridged Dictionary of American English © 2025

dis•con•cert  (dis′kən sûrt′), 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.

• obsolete French disconcerter. See dis-¹, concert
• 1680–90

dis′con•cert′ed, adj. 
dis′con•cert′ing•ly, adv. 
dis′con•cert′ing•ness, n. 
dis′con•cer′tion, dis′con•cert′ment, n. 
Synonyms

• 1. discompose, perplex, bewilder, abash, discomfit. See confuse. 

Antonyms

• 1. calm.
• 2. arrange.

Collins Concise English Dictionary © HarperCollins Publishers::

disconcert / ˌdɪskənˈsɜːt/ verb (transitive)

1. to disturb the composure of
2. to frustrate or upset

ˌdisconˈcertion, ˌdisconˈcertment noun