Based on the prefixes you provided, here are the categories for the words missing the indicated prefixes:
Words Missing the Prefix That Means "three" (tri):
- Triangle (tri + angle)
- Tricycle (tri + cycle)
- Tridimensional (tri + dimensional)
Words Missing the Prefix That Means "before" (pre):
- Preview (pre + view)
- Prehistoric (pre + historic)
- Preheat (pre + heat)
You can drag these words to the corresponding sections based on their missing prefixes.