To call something into question or dispute.
To question or demand the countersign from (one who attempts to pass the lines).
To dare (someone).
To invite (someone) to take part in a competition.
To be difficult or challenging for.
To object to the reception of the vote of, e.g. on the ground that the person is not qualified as a voter.
To take (a final exam) in order to get credit for a course without taking it.
To make a formal objection to a juror.
To dispute (something).
The act of appealing a ruling or decision of a court of administrative agency.
An antagonization or instigation intended to convince a person to perform an action they otherwise would not.
A bid to overcome something.
The act of seeking to remove a judge, arbitrator, or other judicial or semi-judicial figure for reasons of alleged bias or incapacity.
An act of seeking to have a certain person be declared not legally qualified to vote, made when the person offers their ballot.
The act of a sentry in halting a person and demanding the countersign, or (by extension) the action of a computer system demanding a password, etc.
A summons to fight a duel; also, the letter or message conveying the summons.
A difficult task, especially one that the person making the attempt finds more enjoyable because of that difficulty.
An attempt to take possession; a tackle.
An attempt to have a work of literature restricted or removed from a public library or school curriculum.
The opening and crying of hounds upon first finding the scent of their game.
A judge's interest in the result of a case, constituting grounds for them to not be allowed to sit the case (e.g., a conflict of interest).
To convince or influence (someone) by arguing or contending.
To quarrel angrily and noisily; to bicker.
Followed by out of: to elicit (something) from a person by arguing or bargaining.
To gather and organize (data, facts, information, etc.), especially in a way which requires sentience rather than automated methods alone, as in data wrangling.
To argue, to debate; also (dated), to debate or discuss publicly, especially about a thesis at a university.
To make harsh noises as if quarrelling.
To herd (horses or other livestock).
To manage or supervise (people).
Angry disputation; noisy quarrelling.
An angry dispute; a noisy quarrel; an altercation.