put/throw a spanner in the works

:  to place in a specified position or relationship :  lay

:  to move in a specified direction

:  to send (something, such as a weapon or missile) into or through something :  thrust

:  a throw made with an overhand pushing motion

:  the act or an instance of putting the shot

:  an option to sell a specified amount of a security (such as a stock) or commodity (such as wheat) at a fixed price at or within a specified time — compare call 3d

:  being in place :  fixed, set

:  to propel through the air by a forward motion of the hand and arm

:  to propel through the air in any manner

:  pitch

:  an act of throwing, hurling, or flinging

:  an act of throwing dice

:  the number thrown with a cast of dice

:  wrench

:  a wrench that has a hole, projection, or hook at one or both ends of the head for engaging with a corresponding device on the object that is to be turned

:  activity in which one exerts strength or faculties to do or perform something:

:  sustained physical or mental effort to overcome obstacles and achieve an objective or result

:  activity that a person engages in regularly to earn a livelihood

:  used for work

:  suitable or styled for wear while working

:  involving or engaged in work

:  to bring to pass :  effect

:  to fashion or create a useful or desired product by expending labor or exertion on :  forge, shape

:  to make or decorate with needlework