Noun and する verb
ひけつ
今朝新聞で上院は議案を否決したって読んだよ。
I read that the senate rejected the bill in the newspaper this morning.
"No" is the decision I've made. Sorry, but this is rejection.
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.