Riley, Murdoch, "Maori Sayings and Proverbs", Paraparaumu: Viking Sevenseas, 1990 " 'He kupu matangerengere' 'A harsh word.' A word having a 'hideously ulcerated face.' A saying applied to a word, to a sentence or to a speech." It seemed appropriate to the discourtesy being expressed in one or more previous emails on the subject being discussed.