in English is:

verifier

Mutations

Soft:wireddydd
Nasal:ngwireddydd
Aspirate:(no mutation)

Use

y gwireddydd hwn
fy ngwireddydd i
dy wireddydd di
ei wireddydd ef/o
ei gwireddydd hi
ein gwireddydd ni
eich gwireddydd chi
eu gwireddydd nhw/hwy
External

Dictionary Portal

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

Specialist Dictionaries
Glossaries
Terminology
Encyclopedia
Example Sentences
Sentences containing:

*External websites will be opened in a new window.