facultative
1 antonym for facultative — opposites grouped by meaning.
Adj — Relating to a faculty, particularly a mental one.
Synonyms by Meaning
2. adj
Not compulsory; optional or left to individual choice.
“But does the penny fare end here, said Mr. Nixon, at a merely facultative stop? Surely it ends rather at the station.”
Antonyms
Etymology
Taken from French facultatif; by surface analysis it breaks down as faculty + -ative.
Full origin of facultative →