未
wèi · HSK 7
have not yet
🌱 未 = 木 (tree) with an extra top stroke: a tree not yet fully grown
Etymology: 未 draws a tree whose upper branches are still small, so the crop is not yet ripe. That unripe, not-done sense gives it the meanings have not yet and the sentence-final or not.
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.