1. A core or basic issue that is at the root of a situation, requiring resolution before other matters can be addressed
The fundamental problem with this approach is that it doesn't address the root cause.
O problema fundamental dessa abordagem é que não aborda a causa raiz.
2. An essential difficulty or challenge that is central to understanding or solving a larger issue
Poverty remains a fundamental problem in developing nations.
A pobreza permanece um problema fundamental nas nações em desenvolvimento.