read between the lines
US /riːd bɪˈtwiːn ðə laɪnz/
UK /riːd bɪˈtwiːn ðə laɪnz/

1.
leer entre líneas, entender el significado oculto
to understand the hidden meaning in what someone says or writes
:
•
You have to read between the lines to understand what she really means.
Tienes que leer entre líneas para entender lo que realmente quiere decir.
•
His letter seemed straightforward, but I could read between the lines that he was unhappy.
Su carta parecía directa, pero pude leer entre líneas que estaba infeliz.