| Main Entry: | |
| Part of Speech: | adverb |
| Definition: | unexpectedly |
| Synonyms: | aback, abruptly, all at once, all of a sudden, asudden, forthwith, on spur of moment, quickly, short, sudden, swiftly, unanticipatedly, unaware, unawares, without warning |
| Antonyms: | expectedly, slowly |