chàng​suǒ​yù​yán

speak freely

畅所欲言 (暢所欲言) chàng​suǒ​yù​yán
speak freely idiom
To express one's opinions or thoughts freely and without restraint; to speak one's mind to one's heart's content.

At the discussion meeting, everyone spoke freely and put forward many valuable suggestions.

Frequency

Movie subtitles
1.10 per million appears in 1% of films
Written text
2.12 per million

Sources

Definitions
CC-CEDICT