unexpected
adj. B2 Upper Intermediate Oxford US //ˌənɪkˈspɛktɪd// UK //ˌʌnɛkspˈɛktɪd// un·ex·pect·ed
adj. describing something that happens when you do not think it will. It is a surprise because you were not waiting for it or planning for it.
adj. not anticipated or foreseen; occurring without prior notice or expectation.
The rain was unexpected because the sky was clear this morning.
The team celebrated their unexpected victory after the star player scored in the final seconds.
While the merger had been rumored for months, the sudden resignation of the CEO provided an unexpected twist that sent the company's stock into a volatile decline.
From un- + expected.
Usage
Typically functions as an attributive adjective before a noun or a predicative adjective after a linking verb.