is there a specific difference for optimistic 낙관적인 and 낙천적? 비관적 seems to be the correct word for pessimistic (no 천). And why you chose in your personality (oldish, please add more! :D) vocab list?
Haha you’re right, that list is old, perhaps I’ll get around to updating it one of these days.
This is a good question, I have a bit of a feeling about how they are different because I think of the 천 as 천지 (good-world) and the 관 as 관점 (good-outlook). But to make sure I looked it up and according to the 국어국립원,
낙관적: 앞으로의 일 따위가 잘되어 갈 것으로 여기는
낙천적: 세상과 인생을 즐겁고 좋은 것으로 여기는
So basically, 낙관적 means to believe events in the future will go well, while 낙천적 means to believe the world is a nice place. So I think 낙관적 is closer to the way we use ‘optimistic’ in English! I also think 낙관적 is used more often, personally I’ve heard it being used much more.
The opposite of 낙관적 is 비관적, while the opposite of 낙천적 is 염세적.
Hope that helps!!