in English is:

faithfulness

,

fidelity

,

loyalty

Mutations

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

Use

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

Dictionary Portal

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

Specialist Dictionaries
Glossaries
Terminology
Encyclopedia
Example Sentences
Sentences containing:

*External websites will be opened in a new window.