Counterpoise

[Little_Girl]

To act against with equal weight; to equal in
weight; to balance the weight of; to counterbalance.

[Sommer]

a weight that balances another weight

[Hina Muqadas]

A weight sufficient to balance another, as in the opposite scale of a balance; an equal weight.

[GrompelFem]

The relation of two weights or forces which balance each other; equilibrium; equiponderance.

[BertababySog]

Counterpoise generally refers to a factor or force that balances or counteracts another. Typically, it is used in the context of creating equilibrium or stability. It can also refer to the state of being in balance or equilibrium. In engineering, it is used to describe a network of suspended wires or cables, or a weight that balances another weight.