aback

aback

adverb

Definition of ABACK

without warning <completely taken aback by the neighbors' announcement that they were moving>

Synonyms aback, suddenly, unanticipatedly, unaware, unexpectedly

Related Words abruptly, short; amazingly, astoundingly, surprisingly

Near Antonyms laggardly, leisurely, pokily, slowly, sluggishly, tardily; obviously