testify

to deliberately give untrue evidence in a court of law

to give true evidence in a court of law

to give evidence in a public setting, such as a hearing

to appear in person to give evidence

to give evidence in a formal legal setting

to give evidence after making a formal promise to tell the truth

to go to the witness box in a court to give evidence

to decline to give evidence, often on legal grounds

to volunteer to give evidence, especially when it was not previously known you had information

to be given permission by the court to give evidence

to give evidence that incriminates someone

to provide evidence about a particular fact or event

to give evidence in front of a formal body, such as a committee or court

to give evidence that supports someone's case