autodeterminarse

Mostly used in political and legal contexts about a people or region choosing their own political status, echoing the noun autodeterminación (self-determination) found in international law. Rare in everyday personal speech.

• El territorio reclama el derecho a autodeterminarse políticamente. — The territory claims the right to determine its own political status.
• Los pueblos indígenas luchan por autodeterminarse dentro del estado. — Indigenous peoples fight to self-determine within the state.
• Autodeterminarse no significa necesariamente independizarse. — Self-determination doesn't necessarily mean becoming independent.

Learners often treat it as a personal-growth term like 'taking control of your life' — in real usage it's overwhelmingly a political/legal term about peoples or territories, not individual self-improvement.