Spring something on and Take aback

Take aback and spring something on are semantically related in frighten topic. In some cases you can use "Take aback" instead a verb "Spring something on", when it comes to topics like astonish.

Take aback verb - Surprise greatly; knock someone's socks off.

Spring something on and take aback are semantically related in frighten topic. Sometimes you can use "Spring something on" instead a verb "Take aback", if it concerns topics such as astonish.