Also means
to pool
Usage Note
Aunar carries a formal, elevated register and implies bringing together disparate elements into a unified whole — combining unir (to join) with the sense of harmonising differences. You would say aunar esfuerzos ('to pool efforts') or aunar voluntades ('to bring people on board'). In everyday speech, unir or juntar is more natural; aunar appears most in political, academic, and journalistic contexts.
Examples
"Necesitamos aunar fuerzas para lograrlo."
Natural Translation
We need to pool our forces to achieve it.

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