silent
US /ˈsaɪ.lənt/
UK /ˈsaɪ.lənt/

1.
2.
not speaking; saying little or nothing
:
•
He remained silent throughout the meeting.
•
She gave him a silent nod of agreement.
3.
implied but not stated; tacit
:
•
There was a silent understanding between them.
•
The agreement was silent on the matter of compensation.