How to Say "Byproduct" in French

sous-produit

/su.pʁɔ.dɥi/masculine

The English word byproduct translates to French as sous-produit.

sous-produit refers to a secondary or additional product.

Meaning: secondary or additional product (noun)

How does it change in a sentence?

To form the plural sous-produits, add an 's' to the end of the word.

The word has three syllables and is pronounced /su.pʁɔ.dɥi/.

In the culinary world, sous-produits of animals, such as organs and skin, are often referred to as abats or 'offal', rather than using the technical term sous-produit.
While sous-produit is the standard term for industrial processes, if you are describing an accidental or unintended consequence of an action, French speakers often use the term effet secondaire.
The prefix sous- in sous-produit is used in many French terms to describe things that are lower in rank or quality, such as sous-chef for a second-in-command in a kitchen.

Ton ignorance est un sous-produit de ton arrogance.
Your ignorance is a byproduct of your arrogance.
This sentence illustrates how sous-produit can describe a consequence of a person's traits.
Tatoeba #566030 by qdii, translation #566032 by FeuDRenais
L'huile est un produit secondaire de la transformation des olives.
Oil is a byproduct of olive processing.
Les cendres sont des résidus de combustion.
Ashes are byproducts of combustion.
Le lactosérum est un sous-produit de la fabrication du fromage.
Whey is a byproduct of cheese-making.
La créativité est souvent un sous-produit de l'ennui.
Creativity is often a byproduct of boredom.
Le gaz est un sous-produit de la combustion.
Gas is a byproduct of combustion.
Cette chaleur est un sous-produit du processus.
This heat is a byproduct of the process.

Hugo and Manon are talking about a new industrial process.

Hugo

C'est un procédé très efficace.
It is a very efficient process.
Manon

Oui, et il crée un sous-produit utile.
Yes, and it creates a useful byproduct.
Hugo

On peut le recycler facilement ?
Can we recycle it easily?
Manon

Oui, Manon peut s'en occuper.
Yes, Manon can handle it.

Sources

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