Is there a single word for "going the extra mile"?
If possible carrying the connotation, if not the denotation, of being awed and possibly humbled by the lengths to which someone went.
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Sign up to join this communityGoing strictly for a single word, I come up with outperform and overachieve, neither of which are really 100% fits; or perhaps shined:
Wow, you/he/she really shined tonight
as in, did (whatever it was) like a star. (Although, "shone" as the past-tense form may be more idiomatic in that context.)
Here is one possibility: striving.
Definitely not one word, but one number: 110%.
Supererogation: The performance of more work than duty requires. (The Concise Oxford Dictionary, 10th edition)
The the thing about this word is, it sounds rather dry and technical compared to 'going the extra mile'. Another notable point is that neither my quoted source or the on-line Merriam-Webster dictionary (http://www.merriam-webster.com/dictionary/supererogation) list a verb form. To my mind, it isn't much of a stretch to say 'he/she supererogated', but just so you know, that isn't standard English.
You can still describe an act as 'supererogative', though.
I would go for "above and beyond"
Also not a single word, but a common idiomatic expression is...
You really outdid yourself there!
...but this tends to be used either ironically (a gaffe-prone person did/said something particularly gauche) or in contexts where the performance being praised was in any case intended to be entertaining or impressive (but turned out to be exceptionally so).
In more "workaday" contexts - for example, I call a mobile mechanic because my car battery is flat, and he checks my oil/water/tyres while boost-charging it, I'd probably say