To assert, or prove, the truth of.

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

To affirm with confidence; to declare in a positive manner, as in confidence of asserting the truth.

report or maintain; "He alleged that he was the victim of a crime"; "He said it was too late to intervene in the war"; "The registrar says that I owe the school money"

To allege in court papers/pleadings

A work horse, or working ox.