weaken
US /ˈwiː.kən/
UK /ˈwiː.kən/

1.
약화시키다, 약해지다
make or become weaker in power, resolve, or physical strength
:
•
The illness had weakened him considerably.
그 병은 그를 상당히 약화시켰다.
•
The bridge was weakened by the constant heavy traffic.
다리는 끊임없는 교통량으로 약해졌다.