1. to strengthen, improve, or make more effective the obstacles or structures that prevent access, movement, or communication
The government decided to enhance barriers at the border to improve security.
O governo decidiu reforçar as barreiras na fronteira para melhorar a segurança.
2. to make more restrictive or difficult the conditions that limit participation, progress, or interaction
The new policies enhance barriers to entry for small businesses.
As novas políticas reforçam as barreiras à entrada para pequenas empresas.