loosen (someone's) tongue

Translations
развязать (кому-то) язык
A few drinks helped to loosen his tongue.
Несколько напитков помогли развязать ему язык.
Definitions
To make someone more talkative or willing to speak, often by providing encouragement, comfort, or a relaxed atmosphere.
Words
loosen

verb
развязать
someone's

article or possessive pronoun
чей-то
tongue

noun
язык