throws a wrench in

Complicates the process

To throw a wrench in something is to disrupt or sabotage a plan or process, as a wrench thrown into machinery would jam the gears: Her resignation threw a wrench in our expansion plans.

The British equivalent is "throw a spanner in the works." Often appears as throw a wrench into.

Related

hurdle · barrier · sabotage · gums up the works · repercussions · disturbance · snag · obstruction · complication · fly in the ointment · fallout · bottleneck · ramifications · impediment · spanner · breakdown · tampering · intervention

Opposites
facilitation vs obstruction

throws a wrench infacilitates

Makes more possible

helps along · enables · makes possible · paves the way · assists

order vs disruption

throws a wrench inpreserves

Cooked fruit in sugar

stabilizes · holds together · sustains · shores up · reinforces

Family

throw, throws, threw, thrown, throwing, thrower, wrench, wrenches, wrenched

Familiarity
Top 100,000
Profile
Known to kids · Timeless · Negative · Everyday, not technical · Rated G