I am responsible for this failure of neglecting to check it.
This word consists of kanji with hiragana attached. Because the hiragana ends with an う sound, you know this word is a verb. The kanji itself means neglect, so the verb version is to be negligent or to neglect something.
Since this word consists of a kanji with hiragana attached, you can bet that it will use the kun'yomi reading. You didn't learn that reading with this kanji, so here's a mnemonic to help you:
If you always seem to be negligent to your kids you'll end up with this situation. It's winter and your kid comes home from school covered in snow and sneezing. "Oh, coat... (おこた)" you say. You didn't give them a coat when they went out today. Maybe if you weren't so negligent that wouldn't have happened.