countervail
/ˌkaʊntəˈveɪl/verb
with obj.［usu. as adj. countervailing］
- offset the effect of (something) by countering it with something of equal force对抗; 抵消：
the dominance of the party was mediated by a number of countervailing factors.
该党的优势被许多对立因素削弱了。
词源
late Middle English （in the sense 'be equivalent to in value, compensate for'）： from Anglo-Norman French contrevaloir, from Latin contra valere 'be of worth against'.