tiptoe around (someone)

Translations
ходить на цыпочках вокруг (кого-то)
He had to tiptoe around his boss to avoid any conflict.
Ему пришлось ходить на цыпочках вокруг своего босса, чтобы избежать конфликта.
Definitions
To act very carefully or cautiously around someone, often to avoid upsetting or angering them.