counter-
/ˈkaʊntə(r)/prefix
1- denoting opposition, retaliation, or rivalry表示“反对的; 报复的; 敌对的”：
counter-attack
counter-espionage.
1.1
- denoting movement or effect in the opposite direction表示“（运动或效果）相反的; 相对的”：
counterpoise.
1.2
- denoting correspondence, duplication, or substitution表示“对应的; 重复的; 代替的”：
counterpart.
词源
from Anglo-Norman French countre-, Old French contre, from Latin contra 'against'.