Where does “kulmakivi” come from?
kulmakivi (Finnish) comes from Finnish kivi, from Finnish kivihiili, from Finnish hiili — coal; charcoal; carbon.
kulmakivi (Finnish): cornerstone
Ancestry of “kulmakivi”, step by step
| Step | Language | Word | Meaning |
|---|
| 1 | Finnish | kivi | stone; a piece of stone which is larger than a... |
| 2 | Finnish | kivihiili | coal, black coal, bituminous coal |
| 3 | Finnish | hiili | coal; charcoal; carbon |