未熟
みじゅく · mijuku · JLPT N1 · na-adj
immature
未 — tree 木 with extra short top stroke
未 originally pictured a tree with luxuriant new branches at the top, suggesting tender shoots not yet matured. From this 'not yet ripe' image it came to mean 'not yet' or 'have not.' It is also the 8th Earthly Branch, used in the traditional sexagenary cycle.
熟 — 享 (offering) + 灬 (fire)
Originally written 孰, depicting hands offering food (享) for cooking. The fire radical 灬 was later added to emphasize cooking with heat. The core sense 'cooked' extended naturally to 'ripe,' 'familiar,' and 'skilled through repeated practice.'