RESIST

Elude, especially in a baffling way

Example: "This behavior defies explanation"

Stand up or offer resistance to somebody or something

Express opposition through action or words

Example: "Dissent to the laws of the country"

Withstand the force of something

Example: "The trees resisted her"

Resist immunologically the introduction of some foreign tissue or organ

Example: "His body rejected the liver of the donor"

Refuse to comply