unexpected
UK: ˌʌnɪkˈspektɪd | US: ˌʌnɪkˈspektɪd
adj. not expected or foreseen
adj. surprising or unforeseen
The word "unexpected" combines the prefix "un-" (Old English "un-," meaning "not"), the root "expect" (from Latin "expectare," meaning "to await" or "look out for"), and the suffix "-ed" (forming past participles or adjectives). The prefix negates the root, transforming "expected" into its opposite—something not anticipated. This structure reflects a straightforward but powerful linguistic pattern in English, where adding "un-" to an adjective creates its antonym.
The sudden rainstorm was completely unexpected.
Her unexpected arrival surprised everyone at the party.
The team faced unexpected challenges during the project.
He gave an unexpected but heartfelt speech.
The test results were unexpected, leading to further investigation.