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bn:00107939a
Adjective Concept
EN
optional  elective
EN
Possible but not necessary; left to personal choice WordNet 3.0
Definitions
Relations
Sources
EN
Possible but not necessary; left to personal choice WordNet 3.0 & Open English WordNet
Left to personal choice. OmegaWiki
ANTONYM
obligatory
SIMILAR
elective
ex gratia
nonmandatory
WordNet 3.0 & Open English WordNet
EN
optional
OmegaWiki
EN
elective, optional

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