English

Noun

brainwork ‎(uncountable)

1. Work done with the brain; mental effort.
   • 1945 May, George Orwell, chapter 6, in Animal Farm: A Fairy Story, London: Secker & Warburg, OCLC 3655473:

     But not more comfortable than we need, I can tell you, comrades, with all the brainwork we have to do nowadays.

   • 2007 March 21, Will Shortz, “A Rush of Excitement, From Filling in Empty Spaces to Completing a Large Loop”, in New York Times:

     Its rules are so simple they can be explained in two sentences, yet the brainwork needed to solve it is quite complex.