1. A multifaceted problem or challenge that involves multiple interconnected factors or layers, requiring sophisticated analysis and solutions
The dificuldade complexa of climate change requires international cooperation.
A dificuldade complexa das mudanças climáticas requer cooperação internacional.
2. A complication or obstacle characterized by intricate relationships between its component parts
They faced a dificuldade complexa in implementing the new system due to legacy infrastructure.
Eles enfrentaram uma dificuldade complexa na implementação do novo sistema devido à infraestrutura legada.