1. To alter knowingly, usually to conceal the truth.
2. To make false by mutilation or addition; as of a message or story; SYN. distort, garble, warp.
3. To prove false.

1. To make a copy of with the intent to deceive; SYN. fake, counterfeit.
2. To move ahead steadily.
3. To move with increasing speed; SYN. spurt, spirt.
4. To shape with a hammer, in the case of of metals: to hammer.

To fake or falsify; SYN. manipulate, fake, falsify, cook, wangle, misrepresent.