What does antagonize mean?
The definition of antagonize
An*tag”o*nize, v. t.
[imp. & p. p. Antagonized; p. pr. & vb. n.Antagonozing.]
Etym: [Gr. Antagonism.]

To contend with; to oppose actively; to counteract.

An*tag”o*nize, v. i.
To act in opposition.