in English is:

lexicography

Mutations

Soft:eiriaduraeth
Nasal:ngeiriaduraeth
Aspirate:(no mutation)

Use

yr eiriaduraeth hon
fy ngeiriaduraeth i
dy eiriaduraeth di
ei eiriaduraeth ef/o
ei geiriaduraeth hi
ein geiriaduraeth ni
eich geiriaduraeth chi
eu geiriaduraeth nhw/hwy
External

Dictionary Portal

This is a library of dictionaries and other online resources where you can search further for geiriaduraeth*:

Specialist Dictionaries
Glossaries
Terminology
Encyclopedia
Example Sentences
Sentences containing:

*External websites will be opened in a new window.