One who refuses something.

That can be refused.

plural of refusal

(law) A provision in a contract that permits a party to that contract or another named party to have an opportunity to purchase, use, or otherwise obtain a specified object before it is offered to any other party.

The act of refusing. / (civil engineering) Depth or point at which well or borehole drilling cannot continue.

plural of right of first refusal

plural of refusant

The refusal of children or teens to go to school because of some sort of emotional distress. This can be caused by separation or social anxiety disorders, depression, or a phobia.

plural of school refusal

A mental disorder where a child refuses to eat, drink, talk, walk, and so on, and is highly resistant to treatment.