Took aback is a phrasal verb that denotes being surprised or stunned by something unexpected. The antonyms or opposite words for took aback can be calm, composed, unperturbed, unsurprised, unshocked, unsurpassed, unflustered, untroubled, unruffled, or unfazed. These words indicate a state of calmness and composure, where the person is not affected by any sudden change or situation. When used in a sentence, the antonyms for took aback convey a sense of stability and confidence in the person's ability to handle any unexpected situation. It is essential to have control over emotions to respond efficiently to any unexpected occurrence, and the use of antonyms of took aback can help convey this message.