[W/K] :: Epi-

  Epi- \Ep"i-\ [Gr. 'epi` on, upon, to; akin to Skr. api besides,
     and prob. to L. ob to, before, on account of, and perh. to E.
     of, off.]
     A prefix, meaning upon, beside, among, on the outside, above,
     over. It becomes ep-before a vowel, as in epoch, and
     eph-before a Greek aspirate, as in ephemeral.
     [1913 Webster]

  EPI
       n : a self-report personality inventory based on Hans Eysenck's
           factor analysis of personality which assumes three basic
           factors (the two most important being extraversion to
           introversion and neuroticism) [syn: Eysenck Personality
           Inventory]