A person who gives testimony can be referred to in different ways, depending on the circumstances. For examples:
A Skeptic person
Such a person is immortal.
A person who robs is called a "Robber".
a researcher
No, you both need the game.
A person who gives a statement is called a witness.
A mentor
a postman
A Jerk
Witness
A Guidance Counselor.
An employer is the person who gives an employee a job.
@ssh0le.
the lender
There is no antonym for testimony. One cannot prove wrong a person's belief of what they think is true, or their testimony of truth. However, testimony is a synonym for "admissions", (to admit to knowing). The antonym for admissions is "denial", which means to have no testimony of a belief or truth.
A person who fights fire is called a fire fighter.
Nail technition