erode

竞争可能逐渐削弱孩子的信心。

Competition can ___erode a child's confidence.

暴雨能迅速侵蚀河岸。

Heavy rains can quickly ___erode the banks of a river.

持续的批评会逐渐削弱一个人的自尊心。

Constant criticism can ___erode one's self-esteem over time.