pessima fidesglossary / PESSIMA FIDES pessima fides (pes-[schwa]-m[schwa] fI-deez). [Latin] Hist. The worst faith. • The phrase appeared in reference to moral dishonesty. 词条贡献者 译员Susanne,知名国际商学院金融专业,专注翻译各种与并购诉讼有关的法律文件。