Covering
Encompassing, Including
noun, verbal noun
If you spread out some netting enough you'll be covering everything. But you can only do that if you spread it out really far.
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.
あの男はたった一ヶ月で、ここでの業務を網羅した。
That man covered all the tasks here in just one month.