to establish the mood or style for something
établir l'ambiance ou le style pour quelque chose (etablir l'ambiance ou le style pour quelque chose)
"The manager's speech set the tone for the meeting."
"Le discours du manager a donné le ton à la réunion." (le discours du manager set the tone pour la réunion)
To be very close friends who share secrets.
to stop paying attention to what’s happening around you
to prepare energetically to do something
to find a way to outsmart or bypass a system's logic
To have a secret plan or idea.
to examine a story or issue from every perspective