Welsh -der

← Proto-Celtic *-teros (inherited)

← Proto-Indo-European *-teros (derived)

← Cornish -der (cognate)

→ Welsh blinder (affix)

→ Welsh cyfiawnder (affix)

→ Welsh tryloywder (affix)

→ Welsh hyder (affix)

→ Welsh uchelder (affix)

→ Welsh cyflymder (affix)

→ Welsh cryfder (affix)

→ Welsh ysgafnder (affix)

→ Welsh ehangder (affix)

→ Welsh iselder (suffix)

→ Welsh -derau (compound)

→ Welsh cymhwyster (suffix)

→ Welsh llymder (affix)

→ Welsh llymder (affix)

→ Welsh manylder (affix)

→ Welsh uchder (affix)

→ Welsh haelder (affix)

→ Welsh anghyfiawnder (affix)

→ Welsh lleddfder (affix)

→ Welsh esmwythder (affix)