Related Clues:

• Arachnid appropriate prefix
• Bi- times four
• Arachnid-appropriate prefix
• Beginning of eight words?
• Eight (Pref.)
• Word form for ''eight''
• Pod prefix
• Prefix for -pus
• Quadri- doubled
• Prefix with -pus
• Twice quadri-
• Ennea- minus one
• Numerical prefix with -ber
• Half hexadeca-
• Hexadeca-, halved