retrieve The shopkeeper went to the window and retrieved Reuben's treasure. revive Peter tried to revive the frozen robin, but it was stone-dead. suppress All these movements were suppressed by the government. testify This excellent book testifies to the author's ability. accustom The hunter is trying to accustom his hunting dog to the noise of a gun. ambiguous That's a rather ambiguous answer. What exactly do you mean? ascend Step by step the ladder is ascended.