社長は部下の計画を黙諾した。
The president tacitly approved his subordinate's plan.
反対意見が出なかったので、全員の黙諾を得たものとみなした。
Since no objections were raised, we took it that we had everyone's tacit consent.
上層部の黙諾のもとで、不正が長年続けられていた。
With the tacit consent of senior management, the wrongdoing went on for years.