Exact Match:
- unannounced
- without warning or announcement; "they arrived unannounced"; "a totally unheralded telegram that his daughter...died last night"- M.A.D.Howe
Synonyms:
- extraordinary,
- improbable,
- more than expected,
- out-of-the-way,
- past expectation,
- sudden,
- unanticipated,
- undivined,
- unexpected,
- unforeseeable,
- unforeseen,
- unguessed,
- unheralded,
- unhoped for,
- unpredictable,
- unpredicted,
- unprepared for,
- without warning