Indicates an action is completely finished, often with regret or disappointment.
When to use
expressing regret, emphasizing completion, unexpected results, emotional expression
The nuance
Attach '-아/어 버렸어요' to verb stems to show completed past actions with emotions like regret. Use '아' if the last vowel is bright (ㅏ, ㅗ), '어' otherwise. Examples: 가다→가버렸어요, 먹다→먹어버렸어요.
