Explanation
The correct antonym of the word TESTIFY is D: FALSIFY.
The word TESTIFY means to give evidence or to make a statement based on personal knowledge or belief. Its antonym, FALSIFY, means to give false information or to misrepresent the truth.
Option A "Confide" means to reveal or share private information with someone in a trusting way and is not an antonym of TESTIFY.
Option B "Prove" means to demonstrate or establish the truth or existence of something and is not an antonym of TESTIFY.
Option C "Witness" means to observe or see something happen and give testimony about it, which is related to the word TESTIFY but is not its antonym.
Therefore, the correct antonym of TESTIFY is D: FALSIFY.
