Making or producing; causing something to happen (an archaic or technical term rarely used in modern English).
From Latin 'faciens' (making, doing), present participle of 'facere' (to do or make). This adjective form is largely obsolete in English.
You can spot this Latin root 'fac-' everywhere in English: factory, fact, faction, and facile all trace back to the Latin verb meaning 'to do or make'!
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