to do
to discard
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→zuo4fei4 • zuòfèi
become invalid
to become invalid, becomes invalid, be invalid, invalid
这 张 票 已经 作废 了。
This ticket has already become invalid.
如果 不 签字, 文件 会 作废。
If you don't sign, the document will become invalid.
我 的 签证 已经 作废 了。
My visa has become invalid.