sib /ˈsɪb/
  (a.)親屬的,近親的家屬,親族,一切親戚
  sib /ˈsɪb/ 名詞
  Sib, a. Related by blood; akin. [Obs. or Prov. Eng. & Scot.]
     Your kindred is but . . . little sib to you.   --Chaucer.
  [He] is no fairy birn, ne sib at all
  To elfs, but sprung of seed terrestrial.   --Spenser.
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  Sib n.
  1. A blood relation. [Obs.]
  sib
       n 1: a person's brother or sister [syn: sibling]
       2: one related by blood or origin; especially on sharing an
          ancestor with another [syn: blood relation, blood
          relative, cognate]