무던해요 · 무던했어요 · 무던한 (+noun)
easygoing, good-natured, tolerant; fairly good, decent
Example
그 친구는 성격이 무던해서 누구하고나 잘 지내요.
That friend is so easygoing that he gets along with anyone.
Word parts
Adverb 무던히 shifts meaning to 'quite a lot': 무던히 애쓰다 'to try really hard'.