It is an adjectif with a fair few meanings, also you have put it in the plural form soo....
steep (as in hills)
in slang stoned (as in too much alcohol/dope)
tough (as in unbreakable)
Alison is a French nickname for Alice, which in itself is a short form of the German name Adelaide. It is made of the German elements "noble" and "kind".
It's the same in French.
Albert is the French equivalent of Alberto.
The English "a pair" (two objects together) is "une paire" (fem.) in French. The French word "pair" is translated "peer" in English.
Short answer: No one knows.Long answer: Some people speculate it's short for "modulus". Others suggest that it's m because the letters m, n, p, etc, are used to represent parameters. But there's no substantial evidence for either claim.It definitely doesn't come from the French verb to climb, monter. Noted French mathematicians such as Rene Descartes never used m to designate slope. French math courses today use the form y = ax + c.
"raide" is an adjective meaning straight, stiff ("raides" in plural).
raide means stiff, not supple in French. Il a les cheveux raides > he has straight, stiff hair.
raide is stiff, rigid in English.
un cheveu raide (singular), des cheveux raides (plural)
les cheveux raides
"J'ai des cheveux longs et raides" or "mes cheveux sont longs et raides".
J'ai les cheveux raides.
j'ai les cheveux raides
des cheveux raides
'stiff hair'
J'ai les cheveux longs et raides
"châtain" is a light brown hair colour; "raide" means usualy stiff or rigid, but when used to describe hair, would mean "straight" (as opposed to curly). j'ai les cheveux châtains et raides: I have straight, light-brown hair.