I believe it is related to 'demi-pile,' a French term for a ballet dance move. The latter probably a 'short' version of the grand-pile.
A plie is an equal bend of both legs.
The pile of trash.........?
It means, "pile." It could mean a pile of wool, a pile driven into the ground, a Voltaic pile (battery), or an atomic pile (nuclear reactor).
Made a pile means the person has made allot of money (i.e. a pile of money).
A pile show is a piece of metal that goes onto the end of a pile. It is used to aid the pile when it penetrates dirt, and it also protects that pile while it is driving.
the rotary pile rig is a means of achieving a bore by using hydraulic machine without any impact, drill larger dia bore to a greater depth than any other means.
12 Heures is 'midday' or 'noon' in English. Pile means 'sharp'