cistercian(n = noun.person) trappist - member of an order of monks noted for austerity and a vow of silence;
is a kind of monastic, monk

   A monk of the prolific branch of the Benedictine Order, established in 1098 at Cîteaux, in France, by Robert, abbot of Molesme. For two hundred years the Cistercians followed the rule of St. Benedict in all its rigor. [1913 Webster]

cistercian, n. & adj.
--n. a monk or nun of an order founded in 1098 as a stricter branch of the Benedictines.
--adj. of the Cistercians.

Etymology:
F cistercien f. L Cistercium C{icirc}teaux near Dijon in France, where the order was founded

N  clergy, clericals, ministry, priesthood, presbytery, the cloth, the desk, clergyman, divine, ecclesiastic, churchman, priest, presbyter, hierophant, pastor, shepherd, minister, father, father in Christ, padre, abbe, cure, patriarch, reverend, black coat, confessor, dignitaries of the church, ecclesiarch, hierarch, ebdomarius, eminence, reverence, elder, primate, metropolitan, archbishop, bishop, prelate, diocesan, suffragan, dean, subdean, archdeacon, prebendary, canon, rural dean, rector, parson, vicar, perpetual curate, residentiary, beneficiary, incumbent, chaplain, curate, deacon, deaconess, preacher, reader, lecturer, capitular, missionary, propagandist, Jesuit, revivalist, field preacher, churchwarden, sidesman, clerk, precentor, choir, almoner, suisse, verger, beadle, sexton, sacristan, acolyth, acolothyst, acolyte, altar boy, chorister, Pope, Papa, pontiff, high priest, cardinal, ancient flamen, flamen, confessor, penitentiary, spiritual director, cenobite, conventual, abbot, prior, monk, friar, lay brother, beadsman, mendicant, pilgrim, palmer, canon regular, canon secular, Franciscan, Friars minor, Minorites, Observant, Capuchin, Dominican, Carmelite, Augustinian, Gilbertine, Austin Friars, Black Friars, White Friars, Gray Friars, Crossed Friars, Crutched Friars, Bonhomme, Carthusian, Benedictine, Cistercian, Trappist, Cluniac, Premonstatensian, Maturine, Templar, Hospitaler, Bernardine, Lorettine, pillarist, stylite, abbess, prioress, canoness, religieuse, nun, novice, postulant, prophet, priest, high priest, Levite, Rabbi, Rabbin, Rebbe, scribe, mullah, muezzin, ayatollah, ulema, imaum, imam, sheik, sufi, kahin, kassis, mufti, hadji, dervish, fakir, faquir, brahmin, guru, kaziaskier, poonghie, sanyasi, druid, bonze, santon, abdal, Lama, talapoin, caloyer, the Reverend, the very Reverend, the Right Reverend, ordained, in orders, called to the ministry.