/ˌæbnɪˈɡeɪʃən/ – Noun
Definition: 1. việc phủ nhận, phản cung;
2. việc từ bỏ (quyền, yêu sách)
A more thorough explanation: the deliberate renunciation or surrender of a right or claim. It implies a conscious decision to give up something that one is entitled to.
Example: A person might abnegate their right to inherit property by signing a legal document declaring so.