Where does “ffyrnig” come from?

ffyrnig (Welsh) comes from Middle Welsh ffyrnic, from Proto-Brythonic *förnɨg, from Latin fornix, from Latin furnus, from Proto-Italic fornos, from Proto-Indo-European gʷʰr̥-nós, from Indo-European *gʷʰer-.

ffyrnig (Welsh): fierce, savage

Definitions

fierce, savage

Ancestry of “ffyrnig”, step by step

Step	Language	Word	Meaning
1	Middle Welsh	ffyrnic	—
2	Proto-Brythonic	*förnɨg	—
3	Latin	fornix	arch, vault; brothel
4	Latin	furnus	oven; bakery
5	Proto-Italic	fornos	—
6	Proto-Indo-European	gʷʰr̥-nós	—
7	Indo-European	*gʷʰer-	—

Every word from Indo-European *gʷʰer- →Every word from Proto-Indo-European gʷʰr̥-nós →Every word from Proto-Italic fornos →