pray: [13] Latin precārī meant ‘ask for, entreat, pray’ (it has given English deprecate [17] and imprecation [16]). In Vulgar Latin it became *precāre, which passed into English via Old French preier. The noun prayer [13] goes back ultimately to the Latin adjective precārius ‘obtained by asking or praying’ (source also of English precarious), which was derived from precārī. => deprecate, imprecation, precarious[pray etymology, pray origin, 英语词源]