Argument (noun)

1. A reason or set of reasons given with the aim of persuading others that an action or idea is right or wrong.
2. A discussion or debate in which opposing points of view are presented.

Origin:

Late middle english: from old french argument, from latin argumentum "proof, evidence", from arguere "make clear, prove".

Examples:

1. He presented a strong argument for his position.
2. She had an argument with her husband.
3. They had a heated argument about politics.
4. The argument is not about who is right, but about what is best.
5. He made a convincing argument for his proposal.