애꿎어요 · 애꿎었어요 · 애꿎은 (+noun)
innocent, blameless (yet suffering); undeserving
Example
화가 난다고 애꿎은 동생한테 소리 지르지 마세요.
Don't yell at your innocent little brother just because you're angry.
Word parts
Almost always 애꿎은 + noun: the innocent bystander who takes the hit.