Where does “hapras” come from?

hapras (Finnish) comes from Finnish hauras, from Proto-Finnic hapras — brittle, fragile, weak.

Ancestry of “hapras”, step by step

Step	Language	Word	Meaning
1	Finnish	hauras	brittle, fragile, frail, friable, crumbly,...
2	Proto-Finnic	hapras	brittle, fragile, weak

hapras — Etymology, Origin & Word History | Etymology Explorer