IPA: /fɪˈlæk.tə.ri/
KK: /fɪˈlæk.tə.ri/
A small leather box containing religious texts, worn by Jewish men during prayer, one on the forehead and one on the arm.
He carefully placed the phylactery on his arm before the morning prayers.
Phylactery → It is derived from the Greek word "phylaktērion" (meaning a safeguard or amulet), which comes from "phylassein" (meaning to guard or protect). The term refers to a small leather box containing Hebrew texts, worn by Jewish men during prayer as a means of safeguarding their faith.
Think of a 'safeguard' ('phylaktērion') that protects one's beliefs — that's why a phylactery is a protective item containing sacred texts.