quadruple
详见
Single (1) (also:singleton,sole,only,etc.)
Double (2) (also:pair,twice)
Triple (3) (also:triplet,treble,thrice,threesome,troika,trio)
Quadruple (4)
Quintuple or Pentuple (5)
Sextuple or Hextuple (6)
Septuple (7)
Octuple (8)
Nonuple (9)
Decuple (10)
Hendecuple or Undecuple (11)
Duodecuple (12)
Centuple (100)