grand·fa·ther /ˈgræn(d)ˌfɑðɚ/
  祖父;老爺爺
  grandfather
  祖級磁帶
  Grand·fa·ther n. A father's or mother's father; an ancestor immediately after the father or mother in lineal ascent.
  Grandfather longlegs. Zool. See Daddy longlegs.
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  grandfather
       n : the father of your father or mother [syn: gramps, granddad,
            grandad, granddaddy, grandpa]