Self-pictograph and Kangxi radical 25 in just two strokes. Depicts the crack pattern left on a heated tortoise shell or ox scapula during oracle-bone divination — the vertical break and the horizontal branching crack. Diviners read these splits to foretell fortune, the original meaning preserved in
占卜 (divination),
卜卦 (cast a hexagram). Atomic; not analyzable into sub-components.