crossbow
Weapon consisting of a bow mounted on a tiller and fitted with tension and trigger mechanisms.
stirrup 
Device used to hold the crossbow in a vertical position when stretching the bowstring.
pulley block 
Device made up of cords, cables or chains and a double pulley system that increases the bowstring’s tension.
bowstring 
Fibers secured to the bow that are stretched to fire a bolt.
bolt 
Projectile ending in a point with four sides.
trigger 
Device that launches the shot by lowering the nut.
crank 
Device that rotates to tighten the pulley block cord.
pulley 
Small wheel on which the pulley block cord turns when the crank is turned.
tiller 
Piece that supports the bow and anchors the tension and trigger mechanisms.
nut 
Piece that holds the stretched bowstring in one of its grooves.
groove 
Notch in the tiller holding the bolt and guiding it toward the target.
bow 
Principal part of a crossbow; it bends when the bowstring is stretched to fire a bolt.