毕, originally a hand-net for hunting, serves as a phonetic component to form characters. The characters formed by the semantic component have the same pronunciation.
In modern Chinese 毕 means:
1.whole; total; full
2.altogether; completely
3.to finish; to accomplish; to complete
You may also want to check out the component 网
Characters formed by the phonetic component 毕
筚 哔 荜 跸 with the same pronunciation bì