dis ‧ con ‧ cert /ˌdɪskənˈsɜːt $ -ɜːrt/ BrE AmE verb [transitive]
[ Date: 1600-1700 ; Language: Old French ; Origin: desconcerter , from concerter 'to bring into agreement' ]
to make someone feel slightly confused, embarrassed, or worried
—disconcerted adjective :
a disconcerted look