Maundy

Origin

From Middle English maundee, maunde, from Old French mandée (“mandated”), from Latin mandatum (“commandment”). Doublet of mandate. The word came to refer to the foot-washing ceremony performed on Thursday before Easter because of the phrase used by Jesus to explain his act of foot-washing, which in the Latin Vulgate begins: Mandatum novum do vobis ut diligatis invicem ..., i.e. "A new commandment I give unto you: That you love one another …" (John 13:34).