roast, broil, bake
炰 centers on cooking with direct, intense heat: roasting, broiling, or baking food.
炰 combines 包 (wrap) with 灬 (fire), suggesting wrapping food and cooking it over fire. The exact historical development is uncertain, but the component structure points to a phono-semantic origin where 包 may contribute the sound.
The top 包 wraps food, and the bottom 灬 is a blazing fire. Picture wrapping meat in leaves and roasting it over flames: 炰 means roast, broil, or bake.
For ホウ, imagine a wrapped roast being cooked in a hot oven: the word 'hot' sounds like ホウ, and the fire 灬 makes it hot.
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