FOIL n. 12 definitions
The space between the cusps in Gothic architecture; a rounded or leaflike ornament, in windows, niches, etc. A group of foils is called trefoil, quatrefoil, quinquefoil, etc., according to the number of arcs of which it is composed. Foil stone, an imitation of a jewel or precious stone.
FOLK; FOLKS n. 3 definitions
form, and often with a qualifying adjective; as, the old folks; poor folks. [Colloq.] In winter's tedious nights, sit by the fire With good old folks, and let them tell thee tales. Shak.