in English is:

hydrography

Mutations

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

Use

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

Dictionary Portal

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

Specialist Dictionaries
Glossaries
Terminology
Encyclopedia
Example Sentences
Sentences containing:

*External websites will be opened in a new window.