noun

le matelas

mattress

Objet souple et rembourré sur lequel on s’allonge pour dormir ou se reposer, généralement posé sur un lit.

Matelas is a French noun that translates to mattress in English.

Meaning:

A matelas is a large, rectangular pad, typically filled with materials such as foam, cotton, springs, or other cushioning substances, used as a bedding accessory to provide comfort and support to a person lying down.

Parts of the word:

The word matelas does not break down into smaller French words or clear morphemes in regular contemporary usage; it is a single noun.

Synonyms:

Couchage (generally refers to bedding or place to sleep)
Sommier (bed base or box spring, technically different but related)

Antonyms:

No direct antonym, but for contrast:
- Floor
- Hard surface (as an implied antonym to the softness of a mattress)

Additional notes:

In French, un matelas can refer to different types such as matelas en mousse (foam mattress), matelas à ressorts (spring mattress).
The term is mostly used in the context of beds but can also apply in other contexts where cushioning pads are needed for lying or sitting.