I am looking for a single word that implies that something was tedious to do, but was also intellectually challenging. For example, filling out legal forms may be quite tedious, but perhaps it can be intellectually challenging to discern how the content of a form interacts with the law.
I can't seem to find a word that encompasses such a meaning. I considered "toilsome", but I don't think this implies the type of intellectual work that I am looking to describe. "Arduous" falls into the same boat…
A sample sentence would be, "I found the task to be quite Word_Here."
Best Answer
Stressful — ODO