Most of them are related to something being clear, except 뻔하다. 뻔하다 usually means the speaker can tell something even without seeing, or it is so obvious it doesn't take much effort to judge. 맑다 = clear, as in translucent. 날씨가 맑다, 물이 맑다, 맑은 눈동자, 맑은 정신. 분명하다 = clear, as in easily discernible. 분명하게 보이는 발자국. 그의 말은 거짓임이 분명하다. 명백하다 = evident beyond doubt. 그의 의도는 명백해졌다. 뻔하다 = predictably obvious. 그는 싫다고 말할 게 뻔하다. 뻔한 거짓말 (an obvious lie). 선명하다 = distinct and vivid, so as to stand out from the others. 선명한 바퀴 자국 (distinct tire track). 맑다 and 선명하다 typically (but not always) describe a physical aspect. 분명하다 applies both physically and conceptually, while 명백하다 is mostly conceptual. 뻔하다 is usually for non-physical things (like behavior, reaction, future development, etc).

1) 맑다 to be clear for pure and clean : water, air, sky, weather and mind(정신). 2) 분명하다 to be clear about what I see and hear. 3) 명백하다 to be clear for something obvious 4) 뻔하다 to be clear/obvious about predictable fact 5) 선명하다 to be clear for vivid color / sharp picture(사진), screen(화면) / memory(기억) 오늘 하늘이 맑아요. The sky is clear today. 그가 한 말을 분명히 들었어요. I heard what he said clearly. 이건 명백한 사실이에요. It is an obvious fact. 공부를 안 하면 시험에 떨어질 게 뻔해요. If you don't study, it is obvious to fail an exam. 옛날 사진인데도 색이 선명하네요. It's an old picture but the color is clear.

안녕하세요,