to strive or contend about; to contest
to make a subject of disputation; to argue pro and con; to discuss
to oppose by argument or assertion; to controvert; to express dissent or opposition to; to call in question; to deny the truth or validity of
to contend in argument; to argue against something maintained, upheld, or claimed, by another.
Verbal controversy or disagreement; altercation; debate.
An argument or disagreement, a failure to agree.
To lay down a challenge; to provide a test of commitment (often one which carries a high risk) to a cause.
To create a real or artificial boundary or distinction between (two places, people or things).
To indicate the threshold or level above which something will become unacceptable or will provoke a response; to create a boundary and imply or declare that its crossing will provoke a (negative) response.