peri- /ˌpɛrə-/ 前綴
  周圍, 近, 圍入, 圍繞, 環, 迫位
  Per·i-  A prefix used to signify around, by, near, over, beyond, or to give an intensive sense; as, perimeter, the measure around; perigee, point near the earth; periergy, work beyond what is needed; perispherical, quite spherical.
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  peri
       n 1: a beautiful and graceful girl
       2: (Persian folklore) a supernatural being descended from
          fallen angels and excluded from paradise until penance is
          done