肥

• Biological/Physical: Fatness or plumpness in humans and animals. In ancient contexts, this often indicates health, value, and prosperity (e.g., livestock suitable for sacrifice or consumption).
• Agricultural/Environmental: Fertile, rich, or productive soil.

Primarily used as an adjective. It can function as a verb meaning "to fatten" (livestock) or "to enrich/fertilize" (soil); consider a causative reading in sequences involving feeding or land management.

Contrast with 腴: while both describe richness or fatness, 肥 emphasizes bulk, volume, and general richness, whereas 腴 refers to succulence, luster, or the tactile quality of the fat (greasiness/moisture).