Question about "춥다/덥다“

whats the difference between 무덥다 and 덥다? and 쌀쌀하다 and 춥다?

<Answer>

1. 무덥다 : (숨이 막힐 정도로) be stifling; be sweltering; (덥고 습기 차다) be humid; be muggy, be sultry

- 무더운 날 : a sweltering[sultry] day

- 오늘은 날씨가 꽤 무덥다 : The weather is quite hot today

2. 덥다 : be hot

- 더운물이 잘 나오나요? : Is the hot water working okay?

- 날씨가 덥다 : It’s hot weather

3. 쌀쌀하다 : (1) (날씨·바람 등이) feel chilly; (informal) nippy (2) (태도·성질 등이) [=쌀쌀맞다] be cold; be cool; be unfriendly

- 오늘은 날씨가 쌀쌀하다 : It's chilly[nippy] today

- 그녀는 쌀쌀맞은 성격이다 : She has a cold personality

- 그녀는 쌀쌀맞은 여자다 : She is the cold fish

4. 춥다 : be cold; (으슬으슬) be chilly;  (informal) be nippy; (얼어붙을 듯이) be freezing; be frosty; (formal) be frigid

- 추워지다 : get[grow; turn] cold(er)