Aver

Part of speech: noun (n.)

A work horse, or working ox. [Obs. or Dial. Eng.]

Part of speech: verb (v.)

1. To assert, or prove, the truth of. [Obs.]

2. To avouch or verify; to offer to verify; to prove or justify. See Averment.

3. To affirm with confidence; to declare in a positive manner, as in confidence of asserting the truth. It is sufficient that the very fact hath its foundation in truth, as I do seriously aver is the case. Fielding. Then all averred I had killed the bird. Coleridge.

Synonyms: assert; affirm; asseverate. See Affirm.