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“nonmandatory”
nonmandatory (adjective) (not comparative)
Not required by any rule or law; nonobligatory; voluntary: Jane was a very good student who enjoyed taking nonmandatory classes even when they were not necessary for completing her university degree.
This entry is located in the following units:
manu-, man-, mani-, mandat-, manda-
(page 6)
non- +
(page 5)