Latin Church teaching is shown in the Modern Catholic Dictionary:
SUFFERING. The disagreeable experience of soul that comes with the presence of evil or the privation of some good. Although commonly synonymous with pain, suffering is rather the reaction to pain, and in this sense suffering is a decisive factor in Christian spirituality. Absolutely speaking, suffering is possible because we are creatures, but in the present order of Providence suffering is the result of sin having entered the world. Its purpose, however, is not only to expiate wrongdoing, but to enable the believer to offer God a sacrifice of praise of his divine right over creatures, to unite oneself with Christ in his sufferings as an expression of love, and in the process to become more like Christ, who, having joy set before him, chose the Cross, and thus “to make up all that has still to be undergone by Christ for the sake of His body, the Church” (I Colossians 1:24). (Etym. Latin
sufferre, to sustain, to bear up:
sub-, up from under +
ferre, to bear.)
EXPIATION. Atonement for some wrongdoing. It implies an attempt to undo the wrong that one has done, by suffering a penalty, by performing some penance, or by making reparation or redress. (Etym. Latin
ex-, fully +
piare, to propitiate:
expiare, to atone for fully.)
REPARATION. The act or fact of making amends. It implies an attempt to restore things to their normal or sound conditions, as they were before something wrong was done. It applies mainly to recompense for the losses sustained or the harm caused by some morally bad action. With respect to God, it means making up with greater love for the failure in love through sin; it means restoring what was unjustly taken and compensating with generosity for the selfishness that caused the jury. (Etym. Latin
reparare, to prepare anew, restore.)
**ATONEMENT. **The satisfaction of a legitimate demand. In a more restricted sense it is the reparation of an offense. This occurs through a voluntary performance that outweighs the injustice done. If the performance fully counterbalances the gravity of the guilt, the atonement is adequate. And if the atonement is done by someone other than the actual offender, but in his stead, it is vicarious.
Applied to Christ the Redeemer, through his suffering and death he rendered vicarious atonement to God for the sins of the whole human race. His atonement is fully adequate because it was performed by a divine person. In fact, it is superabundant because the positive value of Christ’s expiation is actually greater than the negative value of human sin. (Etym. Middle English
at one, to set at one, to reconcile; of one mind, in accord.)
therealpresence.org/dictionary/adict.htm