to strengthen, reinforce ☊ like: tăng cường → →
etwas verstärken ☊ 
tăng cường, củng cố thứ gì đó ☊ 
加固某物 ☊ jiāgù mǒuwù etwas verstärken ☊ tăng cường, củng cố thứ gì đó ☊ ☊ Guerrillas have pledged to intensify the armed struggle against the new government. ☊ armed ☊
The walls were strengthened to protect them from collapse. ☊ collapse ☊
The campaign is designed to increase public awareness of the issues. ☊ public ☊
Both sides agreed to strengthen political ties. ☊ tie ☊