v .
to impair ; to subvert ; to weaken by excavating underneath 손상시키다 ; 파괴하다 ; 밑을 파서 약화시키다

• The children's adamant refusal to learn French considerably _____s their teacher's effort to teach it to them.
  불어를 배우지 않겠다는 아이들의 단호한 거절이 불어를 가르치려는 선생님의 의지를 적지 않게 무너뜨린다.
• The rushing waters of the flood had _____d the north end of the foundation, and the house was now leaning in that direction.