IPA: //ˈsækrəmənt//
KK: /ˈsækrəmənt/
A religious ceremony or ritual that is considered a means of receiving divine grace, especially in Christianity, such as Baptism and the Eucharist.
The church held a special service to celebrate the sacrament of Baptism for the new members.
Sacrament is derived from the Latin "sacramentum" (meaning a sacred thing or oath), which is formed from "sacer" (meaning sacred) and the suffix "-mentum" (indicating the result of an action). The word refers to a religious rite considered to be a means of divine grace, thus embodying the concept of a sacred act or promise.
Think of 'sacred' ('sacer') to remember that a 'sacrament' is a sacred act or rite.