noun, な adjective
The kanji and the word are exactly the same. That means they share meanings as well.
The reading for this word is an exception. Here's a mnemonic to help you remember it:
You notice a lot of neglect when it comes to old road soap cars (おろそか). If you drive down the old road you'll see neglected cars made of soap all over the place. It's sad, really.
You must not neglect the basics.