Avouch

1. n. Evidence; declaration.
2. v. t. To appeal to; to cite or claim as authority.
3. v. t. To maintain a just or true; to vouch for.
4. v. t. To declare or assert positively and as matter of fact; to affirm openly.
5. v. t. To acknowledge deliberately; to admit; to confess; to sanction.

The word meanings were obtained from OPTED(The Online Plain Text English Dictionary), which is based on “The Project Gutenberg Etext of Webster’s Unabridged Dictionary” which is in turn based on the 1913 US Webster’s Unabridged Dictionary (See Project Gutenburg), as a text file.