날씨가 어때요?

The Korean phrase '날씨가 어때요?' is composed of several elements. '날씨' (nal-ssi) means 'weather'. It's a compound word where '날' (nal) refers to 'day' or 'time', and '씨' (ssi) is a suffix that can denote a state or condition. The origin of '씨' in this context is less clear-cut but can be linked to ancient forms indicating 'seed' or 'essence,' evolving to describe a general state. The root '날' comes from Middle Korean 'ᄂᆞᆯ〯' (Yale: nol), which meant 'day'. This root is shared with other words like '낮' (nat, day/daytime) and '해' (hae, sun/year), indicating a long history tied to the concept of time and celestial bodies. The particle '-가' (-ga) is a subject marker, indicating that '날씨' is the subject of the sentence. Its origins are in Old Korean, where similar particles marked nominative cases. '어때요?' (eo-ttae-yo?) is a polite interrogative form of '어떠하다' (eotteo-hada), which means 'how is it?' or 'to be how'. '어떠하다' itself is a combination of '어찌' (eojji), meaning 'how' or 'what way', and '하다' (hada), meaning 'to do' or 'to be'. '어찌' has roots in Middle Korean '엇뎨' (osyey), which described a manner or method. The '-요' (-yo) ending is a common polite suffix in Korean, softening the tone of the question. Therefore, '날씨가 어때요?' literally translates to 'As for the weather, how is it?' or 'How is the weather?'. The construction reflects a long-standing grammatical pattern in Korean for asking about conditions or states, with roots traceable through Middle Korean and Old Korean linguistic developments, showing how elements for 'day', 'how', and politeness have combined over centuries to form this common expression.