Consent
Agreement, Acceptance
noun, verbal noun, の adjective
You have my consent and agreement. This is my consent, agreement, or 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.
事後承諾になってしまってすみません。
Sorry to ask for your consent after the decision was made.
彼からの承諾の返事はまだないのか？
Still no word from him on his acceptance?
父は、私達の結婚を二つ返事で承諾した。
My father agreed to our marriage without hesitation.