verb · used as a prefix to indicate opposition to or protection against something

这种新型药物具有极强的抗病毒作用。

verb, noun · to resist, fight against, or struggle against an opponent or force

这道坚固的大堤抗住了特大洪水的冲击。

verb · to defy, disobey, or refuse to comply with authority or laws

他因为公然抗命而受到了严重的纪律处分。