unexpected

adj

1. Not expected, anticipated or foreseen.

   “She was a fat, round little woman, richly apparelled in velvet and lace, […]; and the way she laughed, cackling like a hen, the way she talked to the waiters and the maid,[…]—all these unexpected phenomena impelled one to hysterical mirth, and made one class her with such immortally ludicrous types as Ally Sloper, the Widow Twankey, or Miss Moucher.”

   “Certainly unexpected. The P[awn] is overprotected to the best taste of a Nimzowitsch devotee, and there seems to be no drastic weakness in White's camp to justify this intrusion.”

   “But the latest Santa Fe development, while not spurring the Rock Island to any further acceleration, has drawn fire from a totally unexpected quarter.”

   “The windmill presented unexpected difficulties.”

   “Providing accommodation is a significant constraint, and an unexpected development from the restoration of services to Okehampton is demand from the Exeter student population to rent local properties.”

noun

1. (rare)Someone or something unexpected.