This verb means to tell forth, divulge, or speak out about something. In Acts 23:22, the commander instructs Paul's nephew 'to tell no one' that he had revealed the plot against Paul. Classical usage shows it could mean to blurt out, blab, or divulge—sometimes with connotations of talkativeness or indiscretion. The multilingual evidence (Spanish 'digas' = tell, French 'déclarer' = declare) conveys the speaking-out action, though without necessarily the negative connotation of the classical 'blab' sense. Here it's simply about keeping information confidential.