1. (v. t.) To call; to summon.

2. (v. t.) To call upon to witness.

3. (v. t.) To warrant; to maintain by affirmations; to attest; to affirm; to avouch.

4. (v. t.) To back; to support; to confirm; to establish.

5. (v. t.) To call into court to warrant and defend, or to make good a warranty of title.

6. (v. i.) To bear witness; to give testimony or full attestation.

7. (v. i.) To assert; to aver; to declare.

8. (n.) Warrant; attestation.

acknowledge affirm affirmance affirmation allegation allege and candle announcement annunciation assert under oath assertion asseverate asseveration assure attest aver averment avouch avouchment avow avowal back up bear witness book certify conclusion confirm corroborate countersign creed declaration depone depose dictum disclose endorse enunciation give evidence guarantee ipse dixit kiss the book make a promise manifesto pledge plight position position paper positive declaration predicate predication proclamation profession promise pronouncement proposition protest protestation prove say say-so saying sponsor stance stand statement substantiate support swear swear by bell swear the truth swear to swear to God swear to goodness testify troth underwrite uphold utterance verify vouch for vow warrant witness word