Anagrams of: PROVEN_

• President.

• a large sandwich made of a long crusty roll split lengthwise and filled with meats and cheese (and tomato and onion and lettuce and condiments); different names are used in different sections of the United States

• of or relating to the null set (a set with no members)

• a quantity of no importance; thing (object:), singular, negative pronoun; pronoun, thing, singular; quantifier: negative existential

• a mathematical element that when added to another number yields the same number

• the point on a scale from which positive or negative numerical quantities can be measured

• the sight setting that will cause a projectile to hit the center of the target with no wind blowing

• indicating the absence of any or all units under consideration

• having no measurable or otherwise determinable value

• indicating an initial point or origin

• adjust (an instrument or device) to zero value

• adjust (as by firing under test conditions) the zero of (a gun)

• a locally circumscribed place characterized by some distinctive features

• any of the regions of the surface of the Earth loosely divided according to latitude or longitude

• an area or region distinguished from adjacent parts by a distinctive feature or characteristic

• (anatomy) any encircling or beltlike structure

• regulate housing in; of certain areas of towns

• separate or apportion into sections

• a collection of things (goods or works of art etc.) for public display

• cause annoyance in; disturb, especially by minor irritations

• disturb the peace of mind of; afflict with mental agitation or distress

• change the arrangement or position of

• subject to prolonged examination, discussion, or deliberation

• be a mystery or bewildering to

• the sound made by the vibration of vocal folds modified by the resonance of the vocal tract

• (college slang) A president, especially of a university.

• Prefix.

• established beyond doubt