This is the 15023rd most frequent Korean word.
발동
"발동" means "activation" or "starting (of a mechanism, power, or action)."
발동 is used here to denote the initiation or activation of a mechanical process.
기계가 발동되었다.
The machine was activated.
발동 is metaphorically used to indicate the invocation or employment of abilities or skills.
그는 긴급 상황에서 자신의 능력을 발동했다.
He activated his abilities in an emergency situation.
발동 refers to the enforcement or application of legal provisions in this context.