hold one's tongue in Spanish
hold one's tongue in Spanish
mantener la boca cerrada
(idiomatic) To refrain from talking about something.
callarse
(idiomatic) To refrain from talking about something.
cerrar el pico
(idiomatic) To refrain from talking about something.
guardar silencio
(idiomatic) To refrain from talking about something.
morderse la lengua
(idiomatic) To refrain from talking about something.