abundant, lush, bountiful, plenty, fat face, luxurious growth of grass
丰 centers on rich, overflowing growth: abundant vegetation, lush grass, or a bountiful harvest. The sense of a plump or fat face extends the idea of fullness to a person's appearance.
丰 is a pictograph of a plant with a thick stalk and lush leaves, representing abundant growth. The modern form retains the basic plant-like shape.
The three horizontal strokes look like layers of thick grass, and the vertical stroke is a strong stalk. Together they show a plant growing so richly that it becomes a symbol of abundance and a plump, well-fed face.
For ホウ, imagine a whole field of lush grass: whole -> ホウ, and the abundant growth fills the entire field.