noun
permanent member of the UN Security Council
Refers specifically to the five permanent members of the United Nations Security Council (the P5).
常任理事国は拒否権を持っている。
The permanent members of the Security Council have veto power.
Non-permanent member of the UN Security Council, elected for two-year terms without veto power.
Compound of 常任 (permanent appointment) + 理事 (director, trustee) + 国 (country).