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

1.
lire entre les lignes, comprendre le sens caché
to understand the hidden meaning in what someone says or writes
:
•
You have to read between the lines to understand what she really means.
Il faut lire entre les lignes pour comprendre ce qu’elle veut vraiment dire.
•
His letter seemed straightforward, but I could read between the lines that he was unhappy.
Sa lettre semblait directe, mais je pouvais lire entre les lignes qu’il était malheureux.