/ʌnˈrɛdʒɪstəd/ – adjective
Definition: 1. không được đăng ký, không vào sổ;
2. vô danh, trả cho người xuất trình (về các chứng khoán, hối phiếu).
A more thorough explanation: “Unregistered” refers to something that has not been officially recorded or entered into a register or official record.
Example: The company was fined for operating unregistered vehicles on public roads.