‘剖开’ is a compound verb meaning 'to cut open' — literally, ‘to split apart’ (剖) and ‘to open’ (开). It emphasizes a deliberate, often surgical or investigative action of cutting through a surface or outer layer to expose what’s inside. The first character 剖 suggests splitting with precision (like dissecting), while 开 reinforces the result: revealing an interior space or structure.

This word is commonly used in medical, biological, or culinary contexts — for example, during autopsies, surgical procedures, or preparing whole fish or fruit. It carries a formal or technical tone and is rarely used for casual opening (e.g., you wouldn’t say 剖开 a door or a letter). It implies intentionality, control, and often some degree of force or sharpness. While it can describe physical cutting, it’s not typically used for tearing, breaking, or peeling — those involve different verbs like 撕开, 打开, or 剥开.