天氣的悶熱
核心畫面本身：熱壓在空氣裡，散不掉。
adjective · C1
Used about weather or air that is hot and full of wetness, so that it feels heavy, still and sticky.
悶熱的
核心畫面
One way to hold sultry: heat that will not move. Not the bright dry heat of a beach, but the low, damp, heavy kind that settles on a place an hour before a storm. The air stops, the skin stays wet, and everything slows down. Both meanings of the word are that same slow heat — once in the weather, and once in a person.
sultry 的畫面可以想成一種「散不掉的熱」。不是海邊那種亮亮的、乾乾的熱，而是雷陣雨前壓在一個地方、又低又濕又重…更多收起
sultry 的畫面可以想成一種「散不掉的熱」。不是海邊那種亮亮的、乾乾的熱，而是雷陣雨前壓在一個地方、又低又濕又重的熱。空氣停住，皮膚一直是濕的，所有動作都慢下來。這個字的兩個意思用的都是同一種慢熱：一次在天氣裡，一次在一個人身上。From the word’s history
Wiktionary derives sultry from sulter, an obsolete variant of swelter, plus -y; compare sweltry. That points straight at the heat picture: sultry is what swelter feels like.
來源把 sultry 拆成 sulter（swelter 的舊寫法）加 -y，並要我們比較 sweltry。這條線正好指向熱的畫面：sultry 就是 swelter 那種熱給人的感覺。
Wiktionary entry for sultry: From sulter (verb (obsolete), a variant of swelter) + -y; compare sweltry — as supplied in the evidence packet
Two branches
人身上的熱
同一種慢熱，換到人、聲音和眼神上；來源把這一層標為比喻。
adjective · C1
Used about a person, or about their voice or their look, to say that they make other people feel a strong pull of attraction.
性感撩人的