well, maybe you can think of a square dance. when the caller says "dos-y-dos" you go back to back.
le dos
the noun "back" in french is "le dos". The verb - like "to go back" is "rentre".
Sur mon dos
the back
le dos (masc.) means the back (body part) in French.
sac à dos nm pack (backpack)
'le dos" is the back.Il a mal au dos = he has a backachele dos de la main = the back of the handle dos means the back (of the body). For example 'un sac à dos' is a backpack.
le mal de dos, avoir mal au dos
"Back" is an English equivalent of the French word dos. The masculine singular noun most commonly refers to the back side of the human body's trunk. The pronunciation will be "do" in French.
Elle a mal au dos
un sac a dos
Back (on your body)