Ignoring
noun, verbal noun
Shut up and kill your talking or I'll kill it for you. I'm not listening to this. I'm ignoring it.
もくさつ
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.
警察はその地域では多くの犯罪を黙殺しています。
The police ignore most of the crime in this area.