no decir ni mu

Spanish

Etymology

Literally, “to not say 'moo'”.

Verb

no decir ni mu (first-person singular present no digo ni mu, first-person singular preterite no dije ni mu, past participle no dicho ni mu)

1. (idiomatic) to keep mum; to not breathe a word; to not say a word

   Synonym: no decir ni pío

Further reading

• “no decir ni mu”, in Diccionario de la lengua española [Dictionary of the Spanish Language] (in Spanish), online version 23.7, Royal Spanish Academy [Spanish: Real Academia Española], 2023 November 28