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facultatif adj.
comp., MS	optional (Pertaining to a component, parameter and so on that is not required or automatic)
health.	elective
law	optional
med.	facultative; potential; not obligatory

facultatif: 208 phrases in 42 subjects

Agriculture	4
Aviation	1
Commerce	2
Communications	5
Corporate governance	1
Economy	7
Education	1
Electronics	3
Environment	3
Finances	17
Food service and catering	2
General	29
Genetics	2
Grammar	1
Health care	6
Hobbies and pastimes	1
Human rights activism	10
Information technology	8
Insurance	14
International trade	5
Labor law	1
Law	25
Linguistics	5
Marketing	6
Medical	1
Microbiology	1
Microsoft	3
Name of organization	1
Natural resourses and wildlife conservation	2
Patents	6
Pharmacy and pharmacology	1
Phonology	1
Politics	2
Rail transport	1
Social science	1
Statistics	2
Tagmemics	1
Taxes	1
Transport	15
United Nations	5
Virology	3
Work flow	2