Noun and する verb
じゅだく
コウイチはアメリカ合衆国の大統領になることを渋々受諾した。
Koichi reluctantly agreed to become the president of the United States.
I will accept and I have agreement in the matter. I have come to acceptance.
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.