Welsh oer

← Proto-Celtic *ougros (inherited)

← Proto-Indo-European *h₃ewǵ- (inherited)

← Old Irish úar (cognate)

← Old Armenian ոյծ (cognate)

→ Welsh oeri (affix)

→ Welsh oerfel (affix)

→ Welsh annwyd (link)

→ Welsh oeraidd (suffix)

→ Welsh oergell (compound)

→ Welsh iasoer (affix)

→ Irish fuar (cognate)

→ Scottish Gaelic fuar (cognate)

→ Scottish Gaelic fuachd (cognate)

→ Old Irish úar (cognate)