OPTIONAL


Meaning of OPTIONAL in English

adj.

VERBS

▪ be

▪ make sth

ADVERB

▪ entirely , purely

▪

The extra language classes are entirely ~.

Optional is used with these nouns: ↑ accessory , ↑ extra , ↑ feature , ↑ module , ↑ subject , ↑ subtitle

Oxford Collocations English Dictionary.      Оксфордский английский словарь словосочетаний .