억지력이 · 억지력을
deterrence, deterrent power
Example
강한 국방은 전쟁을 막는 억지력이 됩니다.
A strong defense serves as a deterrent that prevents war.
Word parts
억 suppress+지 stop+력 power
Literally 'power to hold back and stop'.
Good to know
Don't confuse with 억지 'stubbornness, forcing it' (native word): 억지를 부리다.