1) Counterbalance 
to be equal in weight; to balance
• (v. i.) To be equal in weight; to weigh as much as another thing. • (v. t.) To make equal in weight; to counterbalance.
E`qui·pon'der·ate intransitive verb [ Equi- + Latin ponderare to weigh. See Ponderate .] To be equal in weight; to weigh as much as another thing. Bp. Wilkins. 
to equal or offset in weight, force, importance, etc.; counterbalance.