Kedves pergynt3 !

és a FINGER-hez kapcsolódik az 5 :


finger
O.E. fingor, from P.Gmc. *fingraz (cf. O.S. fingar, O.N. fingr, Du. vinger, Ger. Finger, Goth. figgrs), with no cognates outside Gmc.; perhaps connected with PIE *pengke, the root meaning "five." As a unit of measure (M.E.) it represents the breadth of a finger, about three-quarters of an inch. The verb meaning "identify a criminal" is underworld slang first recorded 1930. They are generally numbered from the thumb, and named index finger, fool's finger, leech- or physic-finger, and ear-finger.