Synonyms of unexpected in English:

unexpected


See definition of unexpected

adjective

1‘he received an unexpected invitation from Professor Dobson’

SYNONYMS
unforeseen, unanticipated, unpredicted, not bargained for, unlooked for, unhoped for, out of the blue, without warning, without notice
chance, fortuitous, unplanned, serendipitous, adventitious
sudden, abrupt, surprising, startling, astonishing, uncommon, abnormal, extraordinary
North American informal backasswards
ANTONYMS

expected, predictable