"extremely wicked," 1540s, from Latin facinorosus, from stem of facinus "a deed," especially a bad one, from facere "to do" (from PIE root *dhe- "to set, put"). "Very common in 17th c." [OED].
facilitative
facilitator
facilities
facility
facing
facinorous
facsimile
fact
fact-finding
faction
-faction
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