The character "包" depicts an enclosure or womb-like wrapping, meaning "to wrap" or "encircle". When combined with "围", which itself represents walls or boundaries and means "to surround", the two ideographs merge into a single concept. Their formation is a logical compounding, where the first character suggests the action of enveloping and the second reinforces the state of being completely encircled, creating a vivid and intensified meaning of "to surround and cut off" from all sides.