Level 5 · word 9,279 of 20,000

aback

/əˈbæk/ American
  • adv. 向后, 突然, 船顶风地
Definition
  • adv. backward or suddenly, or (of a ship) with sails pressed back by the wind
Example
I was taken aback when she suddenly quit her job.
她突然辞职,让我大吃一惊。