• 蒸気じょうき — steam / vapor
• 蒸発じょうはつ — evaporation / disappearance
• 蒸留じょうりゅう — distillation
• 蒸むし器き — steamer (cooking utensil)
• 蒸むし暑あつい — humid / muggy

The radical 艹 (くさかんむり) often signals a plant or natural connection. Combined with 烝 (heat rising), 蒸 represents the process of steaming or evaporating. It’s strongly associated with cooking methods but also metaphorically means to vanish suddenly (蒸発).

野菜やさいを 蒸むして 健康的けんこうてきな 料理りょうりを 作りました。
I steamed vegetables and made a healthy dish.

彼かれは 突然とつぜん 蒸発じょうはつした。
He suddenly vanished (evaporated into thin air).