Gaspillage vs. perte vs. gâchis

The French words 'gaspillage', 'perte', and 'gâchis' all relate to waste, but they have subtle differences in usage and connotation.

Gaspillage

'Gaspillage' refers to the wasteful use or squandering of resources, often implying carelessness or lack of consideration.
Le gaspillage d'eau est un problème environnemental majeur.
(Water waste is a major environmental problem.)
Évitez le gaspillage de nourriture en planifiant vos repas.
(Avoid food waste by planning your meals.)

Perte

'Perte' means loss and is often used to describe an unintentional or unavoidable waste, frequently in economic or material contexts.
La perte de chaleur par les fenêtres augmente les coûts de chauffage.
(Heat loss through windows increases heating costs.)
L'entreprise a subi une perte importante de revenus cette année.
(The company suffered a significant loss of revenue this year.)

Gâchis

'Gâchis' conveys a sense of waste that is particularly regrettable or unfortunate, often used in more informal contexts.
C'est un gâchis de jeter ces livres en bon état.
(It's a waste to throw away these books in good condition.)
Quel gâchis de talent ! Il aurait pu devenir un grand artiste.
(What a waste of talent! He could have become a great artist.)

Summary

While 'gaspillage' emphasizes wasteful use of resources, 'perte' focuses on unintentional loss, and 'gâchis' expresses a regrettable waste. 'Gaspillage' is often used in environmental contexts, 'perte' in economic situations, and 'gâchis' in more casual, everyday scenarios.