falsifying

(noun) the act of determining that something is false. Synonyms: falsification, disproof, refutation, refutal.

(verb) make false by mutilation or addition; as of a message or story. Synonyms: falsify, distort, garble, warp.

(verb) tamper, with the purpose of deception. Synonyms: fudge, manipulate, fake, falsify, cook, wangle, misrepresent. Examples: "Fudge the figures." "Cook the books." "Falsify the data."

(verb) prove false. Synonyms: falsify. Example: "Falsify a claim."

(verb) falsify knowingly. Synonyms: falsify. Example: "She falsified the records."

(verb) insert words into texts, often falsifying it thereby. Synonyms: interpolate, alter, falsify.