con—cōnficiō, ere, fēcī, fectus, to do thoroughly; complete, prepare; accomplish, make; exhaust, kill.
dē—dēficiō, ere, fēcī, fectum, withdraw, revolt; fail, disappear, give out.
ex—efficiō, ere, fēcī, fectus, to work out, bring to pass, accomplish; make, render, cause, effect.
in—īnficiō, ere, fēcī, fectus, to stain, dye; pollute, taint.
inter—interficiō, ere, fēcī, fectus, to kill; murder.
per—perficiō, ere, fēcī, fectus, to do thoroughly, execute, accomplish.
sub—sufficiō, ere, fēcī, fectus, to put under, or in place of, appoint as successor, substitute; intrans., suffice, be sufficient.
factiō, ōnis [faciō], f., party, faction.
factum, ī [faciō], n., a deed, act.
facultās, ātis [facilis], f., means, opportunity; ability, skill.