Where does “gravandus” come from?

gravandus (Latin) comes from Latin gravō, from Latin gravis, from Proto-Indo-European gʷréh₂us, from Proto-Indo-European -us — Forms adjectives from Caland system roots.

Definitions

Ancestry of “gravandus”, step by step

Step	Language	Word	Meaning
1	Latin	gravō	to burden, weigh down, oppress
2	Latin	gravis	heavy; troublesome, hard; grave, serious
3	Proto-Indo-European	gʷréh₂us	heavy
4	Proto-Indo-European	-us	Forms adjectives from Caland system roots

Every word from Proto-Indo-European -us →Every word from Proto-Indo-European gʷréh₂us →Every word from Latin gravis →