毫升
háo shēng · HSK 4
milliliter
🥛 毫 (milli-) + 升 (liter) = milliliter
毫 means a tiny fraction (milli-, one-thousandth) and 升 is the unit liter. Combined, 毫升 is literally milli-liter. The character 升 originally depicted a scoop or measuring ladle used for grain.
升 — ladle/scoop pictograph (related to 斗)
升 originally pictured a ladle or dipper used to measure grain, closely related to 斗 (a larger dipper). It came to denote a unit of dry measure (a 'sheng', about a liter). From 'scooping up' it extended to the meaning 'rise, ascend'.