1. to make barriers or obstacles more robust, secure, or difficult to overcome
The government decided to strengthen barriers at the border to improve security.
O governo decidiu reforçar barreiras na fronteira para melhorar a segurança.
2. to reinforce physical or metaphorical obstacles that prevent access, progress, or communication
Economic sanctions strengthen barriers to trade between nations.
As sanções econômicas reforçam barreiras ao comércio entre nações.
3. to consolidate defensive measures or protective structures
The company strengthened barriers against cyber attacks.
A empresa reforçou barreiras contra ataques cibernéticos.