To separate things that have become twisted or mixed together.

उलझन से अलग करना

English Usage: She had to untangle the headphones after they were in her bag all day.

Hindi Usage: उसे पूरे दिन बैग में रहने के बाद हेडफोन्स को उलझन से अलग करना पड़ा।

The act of untangling, or the state of being untangled.

उलझने को सुलझाना

English Usage: The untangle of the wires took longer than expected.

Hindi Usage: तारों को सुलझाने में अपेक्षा से अधिक समय लगा।