Deux

Maintenant, à nous deux! = Now I will settle with you; Now is the time for a private explanation; Now to business.

Deux s'amusent, trois s'embêtent (fam.) = Two's company, three's none.

Tous les deux jours ; De deux jours l'un = Every other day.

Piquer des deux = To spur on one's horse; To rush forward.