青春
せいしゅん · seishun · JLPT N1 · noun
young person
青 — 生 (growth/sprout) on top + 丹 (well/cinnabar) below
青 originally depicted young plants (生) growing above a mineral pit (丹, cinnabar well), suggesting the fresh blue-green color of new growth and natural pigments. Over time it came to cover a range of cool colors—green, blue, and even black—and by extension means 'young' or 'youthful.'