그래(geu-rae, geurae)
An affirmative expression used to agree with or permit someone's statement or proposal
When to use
formal agreement, giving permission, serious response to someone's statement
The nuance
Primarily used in polite or formal contexts to show agreement or permission respectfully.
응(eung)
A casual and simple affirmative expression, mostly used among close friends or family
When to use
casual simple affirmation, informal conversation, quick response
The nuance
Used in light conversations or among close relationships to express simple affirmation.