like: der Feind → →
der Feind ☊ 
kẻ địch ☊ 
☊ The city is in the control of enemy forces. ☊ control ☊
The enemy was/were forced to retreat. ☊ enemy ☊
The enemy kept up the bombardment day and night. ☊ keep sth up ☊
The enemy won because of their superior numbers (= there were more of them). ☊ superior ☊