춥다
chupda · TOPIK 1
to be cold (weather)
🧊🧣 Sounds like chup-da: your lips chap, duh, when the weather is cold
춥다 is only for weather or how cold you feel, not for cold objects (that is 차갑다). The ㅂ is irregular: it turns into 우 in 추워요, so the everyday form you hear is chuwoyo. Chapped lips link the sound chup to cold air.