commutation

definition: the act of putting one thing or person in the place of another: 'he sent Smith in for Jones but the substitution came too late to help'
example:
speech part: noun
synonyms: exchange
definition: the travel of a commuter
example:
speech part: noun
synonyms: commuting
definition: (law) the reduction in severity of a punishment imposed by law
example:
speech part: noun
synonyms: re-sentencing
definition: a warrant substituting a lesser punishment for a greater one
example:
speech part: noun
synonyms:

commutation is explained and pronounced

How commutation is being used?