1. To act against with equal effect; to equal; to compensate.

2. Equal weight, power, or value.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• counterfait,
• xountervail,
• vountervail,
• fountervail,
• contervail,
• coutervail,
• counervail,
• countrevail,
• counterveil,
• countervayl,
• countervaile,
• counterviw,
• counterview,
• Counterviev,
• countretaile,
• Couneterveil,
• Countervaille,
• contervaill,
• countervall,
• counterveill

• counterbalance,
• counterstrike,
• counteraction,
• countermand,
• countercharge,
• counterpoison,
• counterattack,
• Contreras,
• counteract,
• connatural,
• counterspy,
• countercoup,
• counterplea,
• counterclaim,
• counterpoised,
• countersuit,
• counterpart,
• countervailing,
• counterpunch,
• counterblast,
• countermine,
• counterexample,
• counter check,
• counterculture,
• countertenor,
• counterman,
• countermove,
• counteroffer,
• countercheck,
• counterchange,
• commuter,
• countermelody,
• counterfeiter,
• countershot,
• contrail,
• counterplot,
• countersign,
• counterpane,
• counteractive,
• counterfire,
• counterblow,
• counterplay,
• conterminous,
• counterstain,
• contrite,
• counterwoman,
• counterfactual,
• counterglow,
• counterplan,
• counterperson,
• countermarch,
• Conteras,
• counterpoise,
• counterbore,
• counterfeit,
• countertop,
• counterfoil,
• countersink,
• counterweight,
• counter-drill,
• counterpose,
• counter tube,
• counterpoint.

The adverb form of "countervail" is "countervailingly".

The adjective form of the word "countervail" is "countervailing".

The plural form of the word "countervail" is "countervails"

The singular form of the word "countervail" is "countervail".