1993, Pierre Janton aut., Humphrey Tonkintr., Jane Edwards tr., and Karen Johnson-Weiner tr., Esperanto: Language, Literature, and Community (: ; ISBN 0791412539, 0791412547), chapter 4: “Expressionâ€, page 87We are dealing here not with a poetic convention but with a fundamental characteristic of the language — a characteristic further illustrated in the ability to use grammatical morphemes as lexical units, thereby enriching the vocabulary with a whole series of lexemes derived from essentially grammatical devices: ano = membro, aĵo = objekto, aro = grupo, ejo = loko, eta = malgranda, ege = multe, ene = interne, and so on. These can be considered as authentic Esperantisms — as can constructions which in a sense move in the opposite direction: suni, furiozi, fervori, malĉasti, ebli, and others.