Contest (verb)

1. Dispute or disagree with (a decision, statement, or theory).
2. Compete against (someone) in a contest, game, or election.
3. Challenge the validity of (a will) in a legal action.

Origin:

Late middle english: from old french contest(e)r, from latin contestari "call to witness, dispute", from con- "together" + testari "to bear witness".

Examples:

1. He contests the decision.
2. She is contesting the election.
3. The company is contesting the charges.
4. The team contested the call.
5. The will was contested in court.