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.
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.
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 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 call something into question or dispute.
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 submitting or yielding; surrender.
The act of submitting or giving e.g. a completed piece of work.
A submission hold in wrestling, mixed martial arts, or other combat sports.
The thing which has been submitted.
A subset or component of a mission.