Mattress

[ma-tris] /ˈmæ trɪs/

noun
1.
a large pad for supporting the reclining body, used as or on a bed, consisting of a quilted or similarly fastened case, usually of heavy cloth, that contains hair, straw, cotton, foam rubber, etc., or a framework of metal springs.
2.
.
3.
a mat woven of brush, poles, or similar material, used to prevent erosion of the surface of dikes, jetties, embankments, dams, etc.
4.
a layer of concrete placed on bare ground, as to provide a footing; mat.
5.
a layer of any material used to cushion, protect, reinforce, or the like.
/ˈmætrɪs/
noun
1.
a large flat pad with a strong cover, filled with straw, foam rubber, etc, and often incorporating coiled springs, used as a bed or as part of a bed
2.
Also called Dutch mattress. a woven mat of brushwood, poles, etc, used to protect an embankment, dyke, etc, from scour
3.
a concrete or steel raft or slab used as a foundation or footing Sometimes shortened to mat
4.
a network of reinforcing rods or expanded metal sheeting, used in reinforced concrete
5.
(civil engineering) another name for blinding (sense 3)
n.

late 13c., from Old French materas (12c., Modern French matelas), from Italian materasso and directly from Medieval Latin matracium, borrowed in Sicily from Arabic al-matrah “the cushion” (cf. Spanish almadraque “mattress,” Provençal almatrac), literally “the thing thrown down,” from taraha “he threw (down).”