To make reparation, compensation, amends or satisfaction for an offence, crime, mistake or deficiency.
To absolve (someone else) of wrongdoing, especially by standing as an equivalent.
To apply weight in order to balance an opposing weight.
To match or equal in effect when applying opposing force
A weight that is put in opposition to an equal weight so it keeps that in balance.
A force or influence that balances, checks or limits an opposite one.