mowatto
A sudden wave of hot, humid air hitting you — like stepping outside from an air-conditioned building in summer.
💡Exiting a cool building into summer heat — 'The air hit me mowatto when I stepped outside.'
湯気がもわっと立ち上った。
Steam rose up mowatto in a warm cloud.
Stepping off the train, the summer heat hit me ___.
電車を降りたら、夏の熱気が○○と押し寄せた。