What's a word for something that requires focus for a long time?
The opposite of "quick". For a example:
Washing the dishes is a quick task
But
Writing an essay is a _ task
I'm looking for an adjective (so no "task that requires focus"), preferably one that isn't opinionated about the task itself, so no "onerous" for example.
Solution 1:
Maybe the word 'Lengthy' can fit your essay sentence.
Solution 2:
As in: TFD
Writing an essay is a time-consuming task.
taking up much time
Solution 3:
Writing an essay is an engrossing task
Cambridge Dictionary: adj. very interesting and requiring all your attention