1. to obstruct, hinder, or reduce the ability of something to work efficiently or achieve desired results
Poor communication can hamper effectiveness in project management.
A má comunicação pode prejudicar a eficácia na gestão de projetos.
2. to impede the performance or efficiency of a system, person, or process
Budget cuts hamper effectiveness of public services.
Cortes orçamentários prejudicam a eficácia dos serviços públicos.