go out of your way
Synonym discussion
Sense: idiom/1
All four phrases describe making an effort beyond the ordinary, but they differ in strength and formality. 'Go out of your way' (B1) is the most neutral and common — it suggests doing something inconvenient because you care. 'Go the extra mile' (B2) adds a sense of exceeding expectations, often used in service or work contexts. 'Bend over backwards' (B2) is more dramatic and informal, implying you pushed yourself to an uncomfortable degree. 'Take the trouble' (B2) is slightly more formal and can carry a tone of grudging respect, as in 'She took the trouble to write a thank-you note.' For everyday conversation about kindness, 'go out of your way' is the safest choice: 'Our host went out of his way to make us feel comfortable.'
Etymology
This phrase started as a literal description — if you 'went out of your way,' you took a longer or different route than the most direct one. By the 1500s, English speakers began using it figuratively: making an extra effort for someone is like leaving your normal path to help them, then returning to your own business. The image of a physical detour made the idea of doing something inconvenient for another person easy to understand and remember.