cannibaliser

In business and marketing, cannibaliser means for one product or service to eat into the sales of another from the same company — le nouveau modèle risque de cannibaliser les ventes de l'ancien. A metaphorical extension of the literal 'to cannibalize' (eat one's own kind), rare outside that business context in French.

• Le nouveau forfait risque de cannibaliser les ventes de l'offre premium. — The new plan risks cannibalizing sales of the premium offer.
• L'entreprise craint que ce produit ne cannibalise sa gamme existante. — The company fears this product will cannibalize its existing line.
• Les deux marques du groupe se cannibalisent sur le même marché. — The group's two brands are cannibalizing each other in the same market.

In French, cannibaliser is almost always used in this business/marketing sense (internal competition between products) — the literal 'eating human flesh' sense exists but is far less common than in English pop-culture usage.