The mound/hill radical. A pictograph of stacked earthen platforms — terraced hillsides. Hugely productive in terrain, defense, and elevation vocabulary, almost always appearing as the left-side variant 阝: 阳, 阴, 院, 防, 险, 阶, 阻, 阻, 限. Visually identical to right-side 阝 (邑) but with a completely different etymology and meaning.