Morpheme
-arian
Type
suffix
Denotation
(1) agent suffix denoting a believer, advocate, or habitant; (2) agent suffix denoting “one who eats”
Etymology
backformed from various words ending in -arian via (1) Classical or Medieval Latin words ending in -arius; (2) Old French words ending in -arien(ne) or -erien(ne); (3) English words ending in -ary; (4) from vegetarian (<Vegete + -arian>)
Evidence
alphabetarian, altitudinarian, anisomyarian, anthroparian, antidisestablishmentarian, antiestablishmentarian, anythingarian, attitudinarian, bestiarian, breatharian, celibatarian, charitarian, chickenarian, climatarian, complementarian, conflictarian, contractarian, declinarian, disciplinarian, disestablishmentarian, documentarian, elitarian, establishmentarian, experimentarian, fermentarian, formicarian, fruitarian, genarian, herbarian, herbertarianism, hexagenarian, infralapsarian, jubilarian, juicearian, lapsarian, latitudinarian, limitarian, meatarian, nonagenarian, nothingarian, octogenarian, parliamentarian, platitudinarian, polymyarian, postlapsarian, predestinarian, prelapsarian, quadragenarian, quinquagenarian, quodlibetarian, ranarian, rectitudinarian, sabbatharian, sacramentarian, sanguinarian, sectarian, semicentenarian, semisupercentenarian, septuagenarian, sexagenarian, solitudinarian, sproutarian, sufficientarian, transdisciplinarian, ultracrepidarian, valetudinarian, vegetarian, verbarian
Notes
most words that end in <arian> are not formed with the -arian suffix but rather <ary + an> or <ar + i + an>