To cause a serious problem or obstacle that disrupts plans, progress, or the normal functioning of a system or process; to sabotage or derail an operation.
Examples:
EN: I'll just have to throw a monkey wrench in the works.
ES: Voy a tener que lanzar una llave inglesa en las instalaciones.
ID: Aku cuma perlu melempar kunci pas.
EN: However, they had to know that changing passports and names would throw a monkey wrench in the works.
HI: लेकिन उन्हें क्या पता था कि जिन्हें वे अपना पासपोर्ट और कैश दे रहे हैं वह एक ठगों की बड़ी गैंग है.
EN: I hate to throw a monkey wrench in the works, but don't you think we should ask Andy to help。
TE: నేను రచనలలో ఒక కోతి పట్టీని విసిరేస్తాను, కాని ఆండీ సహాయం కావాలని మీరు అనుకోవద్దు.