Question

sort the words according to the meanings of their shared roots. clarification clarity pentathlon pentagon pentagram pentacle five clear

Explanation:

The prefix "penta -" means five, seen in pentathlon (five - event sport), pentagon (five - sided polygon), pentagram (five - pointed star), pentacle (five - pointed symbol). The root "clar -" means clear, as in clarification (making clear) and clarity (the state of being clear).

Answer:

five: pentathlon, pentagon, pentagram, pentacle
clear: clarification, clarity