Fidus Achates.—Faithful Achates (that is, a true friend.)
Fieri facias.—Cause it to be done (a kind of writ.)
Filius nullius.—A son of nobody.
Fille-de-chambre.—A chambermaid.
Finale.—To close or end.
Finem respice.—Look to the end.
Finis.—The end.
Finis coronat opus.—The end crowns the work.
Flagrante bello.—While the war is raging.
Flagrante delicto.—In the commission of the crime.