Mehercule. Medius Fidius. I have given the rendering of the latter, which seems preferred by Paley (Ov. Fast. vi. 213, note), who considers it = me dius (i.e., Deus) fidius juvet. Smith (Lat. Dict. s.v.) agrees with him, and explains it, me deus fidius servet. White and Riddle (s.v.) take the me (which appears to be short) as a “demonstrative” particle or prefix, and explain, “By the God of truth!” “As true as heaven,” “Most certainly.”