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testify verb

VERB + TESTIFY be prepared to, be willing to | be unwilling to, refuse to | call sb to, force sb to The president's former aides were called to testify at his trial.

PREP. against She refused to testify against her brother. | before She was unwilling to testify before Congress. | for a Mafia member who was prepared to testify for the authorities | to A senior officer testified to the existence of police hit squads. A large number of witnesses testified to the tribunal.

PHRASES testify in court