" phylacteries "

[Noun]  | "phy*lac*tery" | \ fə-ˈlak-t(ə-)rē \

1: either of two small square leather boxes containing slips inscribed with scriptural passages and traditionally worn on the left arm and on the head by observant Jewish men and especially adherents of Orthodox Judaism during morning weekday prayers

2: amulet

Origin: 14th century ;

 Middle English filaterie, philacterie, borrowed from Late Latin filactērium, phylactērium "amulet, tefellin," borrowed from Greek phylaktḗrion "guarded place, outpost, safeguard, amulet, tefellin," from phylaktḗr "guard, guardian" (from phylak-, stem of phylássein "to keep watch on, guard, preserve" —derivative of phylak-, phýlax "guard, guardian, protector," of obscure origin— + -tēr, agent suffix) + -ion, noun suffix;

  * Note : Greek phýlax has no generally accepted Indo-European etymology, and is probably of pre-Greek substratal origin, as other words with the suffix -ak-, according to R. Beekes, Etymological Dictionary of Greek, Brill, 2010.;

[Noun]  | "phylacteries" 

[Noun]  | "phylactery"