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).
Used to express what the speaker would do in another person's situation, as a means of giving a suggestion or recommendation.
Will be likely to (become or do something); indicates a degree of possibility or probability that the stated thing will happen or be true in the future.
Indicates that something is expected to have happened or to be the case now.
Used to express a conditional outcome.
With verbs such as 'see' or 'hear', usually in the second person, used to point out something remarkable in either a good or bad way.
To make a statement of what ought to be true, as opposed to reality.
Used to impart a tentative, conjectural or polite nuance.
Simple past tense of shall.
In questions, asks what is correct, proper, desirable, etc.
Used to issue an instruction (traditionally seen as carrying less force of authority than alternatives such as 'shall' or 'must').
Used to give advice or opinion that an action is, or would have been, beneficial or desirable.
Used to form a variant of the present subjunctive, expressing a state or action that is hypothetical, potential, mandated, etc.
Something that ought to be the case as opposed to already being the case.