countervail

coun·ter·vail  (kountr-vl, kountr-vl)

v. coun·ter·vailed, coun·ter·vail·ing, coun·ter·vails

v.tr.

1. To act against with equal force; counteract.

2. To compensate for; offset.

v.intr.

To act against an often detrimental influence or power.

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[Middle English countrevaillen, from Old French contrevaloir, contrevail- : contre-, counter- + valoir, to be worth (from Latin valre, to be strong; see wal- in Indo-European roots).]

Thesaurus

Verb	1.	countervail - compensate for or counterbalance; "offset deposits and withdrawals" offset balance, equilibrise, equilibrize, equilibrate - bring into balance or equilibrium; "She has to balance work and her domestic duties"; "balance the two weights"
	2.	countervail - oppose and mitigate the effects of by contrary actions; "This will counteract the foolish actions of my colleagues" counteract, counterbalance, neutralize override - counteract the normal operation of (an automatic gear shift in a vehicle) cancel, offset, set off - make up for; "His skills offset his opponent's superior strength"