Question

Sort the words according to the meanings of their shared roots.
quadratic, extracranial, extraterrestrial, quadruped, quadruple, extraordinary
Is it outside or is it four

Answer 1

Words meaning "outside / beyond" (root extra-):
- extracranial — outside the skull (extra- = outside)
- extraterrestrial — beyond the Earth (extra- = beyond/outside)
- extraordinary — beyond the ordinary (extra- = beyond/outside)

Words meaning "four" (root quad-/quadr-):
- quadratic — literally "square" (from Latin quadratus, from quattuor = four); in math: degree 2 (square)
- quadruped — four-footed (quad- = four)
- quadruple — fourfold (quad- = four)

So the first three are "outside/beyond" and the last three are "four."