A wrench (spanner) with an adjustable jaw. / (idiomatic) An unexpected or troublesome problem, obstacle or dilemma.

plural of monkey wrench

Alternative form of monkey wrench

plural of monkey-wrench

(idiomatic) Synonym of throw a spanner into the works

(idiomatic, US) Synonym of throw a spanner in the works.

simple past tense of throw a monkey wrench in the works

Third-person singular simple present indicative form of throw a monkey wrench in the works

present participle of throw a monkey wrench in the works

past participle of throw a monkey wrench in the works