commutation

/kɒmjuːˈteɪʃən/

noun

1
A passing from one state to another; change; alteration; mutation.
2
The act of giving one thing for another; barter; exchange.
3
Substitution of one thing for another; interchange.
4
Specifically, the substitution of one kind of payment for another, especially a switch to monetary payment from obligations of labour.
5
The change to a lesser penalty or punishment by the State
6
Substitution, as a means of discriminating between phonemes.
7
The reversal of an electric current.

1
The process or habit of journeying to and from work on a regular basis; commuting.

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