throw a wrench into the works

: 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

: to move with a violent twist

: to pull or strain at something with violent twisting

: to twist violently

: a violent twisting or a pull with or as if with twisting

: a sharp twist or sudden jerk straining muscles or ligaments

: a distorting or perverting alteration

: 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