aver

from The American Heritage® Dictionary of the English Language, 5th Edition.

• transitive verb To affirm positively; declare.
• transitive verb Law To assert formally as a fact.

from The Century Dictionary.

• noun Substance; property; estate.
• noun plural Live stock; cattle; domestic animals.—
• noun A beast of burden; a draft-ox or draft-horse; an old horse.
• To assert the truth of.
• To confirm; verify; prove to be true.
• To affirm with confidence; declare in a positive or peremptory manner.
• In law, to avouch or verify; offer to verify; allege as a fact.
• To assert the existence of; offer in evidence.
• Synonyms Affirm, Declare, etc. (see assert), say, allege, protest, insist, maintain.

from the GNU version of the Collaborative International Dictionary of English.

• noun Obs. or Dial. Eng. A work horse, or working ox.
• transitive verb obsolete To assert, or prove, the truth of.
• transitive verb (Law) To avouch or verify; to offer to verify; to prove or justify. See Averment.
• transitive verb To affirm with confidence; to declare in a positive manner, as in confidence of asserting the truth.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun obsolete Possessions, property, belongings, wealth.
• noun dialectal A work-horse, working ox, or other beast of burden.
• verb To assert the truth of, to affirm with confidence; to declare in a positive manner.
• verb law To prove or justify a plea.
• verb obsolete To avouch, prove, or verify; to offer to verify.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• verb to declare or affirm solemnly and formally as true
• verb report or maintain