Optional
"Optional" in Russian
необяза́тельный
neobjazátelʹnyj
(not compulsory)
опциона́льный
opcionálʹnyj
(not compulsory)
факультати́вный
fakulʹtatívnyj
(not compulsory)
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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.