dis·con·cert 
/ˌdɪskənˈsɚt/ verb
dis·con·certs; dis·con·cert·ed; dis·con·cer·ting /ˌdɪskənˈsɚt/ verb [+ obj] somewhat formal : to make (someone) upset or embarrassed
▪ News of his criminal past has disconcerted even his admirers. — often used as (be) disconcerted ▪ I was disconcerted by her tone of voice.
▪ News of his criminal past has disconcerted even his admirers. — often used as (be) disconcerted ▪ I was disconcerted by her tone of voice.
— disconcerted /ˌdɪskənˈsɚtəd/ adjective [more disconcerted; most disconcerted]
▪ We were very disconcerted to learn that our flight had been canceled.
▪ We were very disconcerted to learn that our flight had been canceled.
— disconcerting /ˌdɪskənˈsɚtɪŋ/ adjective [more disconcerting; most disconcerting]
▪ I found it disconcerting to be left alone in her office. ▪ He has a disconcerting habit of answering a question with another question.
▪ I found it disconcerting to be left alone in her office. ▪ He has a disconcerting habit of answering a question with another question.
— dis·con·cert·ing·ly adverb
