1350-1400;Middle English < Late Latinmonastērium < Late Greekmonastḗrion monk house, orig. hermit's cell, equivalent to monas-, variant stem of monázein to be alone (see mon-) + -tērion neuter adj. suffix denoting place
[mon-uh-steer-ee-uh l] /ˌmɒn əˈstɪər i əl/ (Show IPA), adjective
c.1420 (implied in monasterical), from O.Fr. monastere, from L.L. monasterium, from Late Gk. monasterion "a monastery," from monazein "to live alone," from monos "alone" (see mono-). With suffix -terion "place for (doing something)." Originally applied to houses of any religious order, male or female.