Consent; agreement; accepting or agreeing to something (to give one's approval).
彼は上司の提案に納得して、プロジェクトに参加した。
He agreed to his boss's proposal and joined the project.
契約の条項に納得がいかない場合は、サインしないでください。
If you don't agree with the contract terms, don't sign.
両者の間で納得が得られれば、取引は成立する。
If both parties reach an agreement, the deal will be concluded.
Understanding; being convinced or satisfied (e.g., after an explanation).
説明を聞いてようやく納得できた。
After hearing the explanation, I was finally convinced.
彼の言い訳には納得がいかない。
I can't accept his excuse.
どうしてそうなるのか納得がいくまで質問した。
I asked questions until I understood why that happened.