1To become steamed (properly), as when rice or steamed dishes are cooked and reach the steamed state.
蒸し器で蒸れている中華まんを取り出す。
Take out the steamed buns that are steaming in the steamer.
もち米がちょうどよく蒸れて、香りが立っている。
The glutinous rice is perfectly steamed and fragrant.
2To become stuffy, clammy, or musty due to humidity/heat; to grow sweaty or to develop a musty smell (used for rooms, clothes, shoes, skin, etc.).
梅雨で部屋が蒸れて、窓に水滴がついている。
During the rainy season the room becomes stuffy and droplets form on the windows.
長時間履いた靴が蒸れて、嫌なにおいがする。
Shoes worn for a long time get sweaty and give off an unpleasant smell.
湿気で布団が蒸れてしまい、陰干しが必要だ。
The futon has become musty from humidity and needs airing out in the shade.