Webster's Revised Unabridged Dictionary · 1913

Equiponderate

Equiponderate , intransitive verb

[Equi- + Latin ponderare to weigh. See Ponderate.]

To be equal in weight; to weigh as much as another thing. — Bp. Wilkins

Equiponderate , transitive verb

To make equal in weight; to counterbalance.
More than equiponderated the declension in that direction. — De Quincey