Synonyms and Antonyms of aback

  1. without warning <completely taken aback by the neighbors' announcement that they were moving> Synonyms unawares, suddenly, unanticipatedly, unaware, unexpectedlyRelated Words abruptly, short; amazingly, astoundingly, surprisinglyNear Antonyms laggardly, leisurely, pokily, slowly, sluggishly, tardily; obviously

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