prevaricate

American Heritage® Dictionary of the English Language, Fourth Edition

1. v. To stray from or evade the truth; equivocate. See Synonyms at lie².

Century Dictionary and Cyclopedia

1. To deviate; swerve from the normal or proper course; stray.
2. To swerve from the truth; act or speak evasively; quibble.
3. In law: To undertake a thing falsely and deceitfully, with the purpose of defeating or destroying the object which it is professed to promote.
4. To betray the cause of a client, and by collusion assist his opponent.
5. To pervert; cause to deviate from the normal or proper path, application, or meaning.
6. To transgress; violate.

Wiktionary

1. v. transitive, intransitive, obsolete To deviate, transgress; to go astray (from).
2. v. intransitive To shift or turn from direct speech or behaviour; to evade the truth; to waffle or be (intentionally) ambiguous.
3. v. intransitive, law To collude, as where an informer colludes with the defendant, and makes a sham prosecution.

GNU Webster's 1913

1. v. To shift or turn from one side to the other, from the direct course, or from truth; to speak with equivocation; to shuffle; to quibble.
2. v. (Civil Law) To collude, as where an informer colludes with the defendant, and makes a sham prosecution.
3. v. (Eng. Law) To undertake a thing falsely and deceitfully, with the purpose of defeating or destroying it.
4. v. obsolete To evade by a quibble; to transgress; to pervert.

WordNet 3.0

1. v. be deliberately ambiguous or unclear in order to mislead or withhold information