in English is:

seamanship

Mutations

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

Use

y llongwriaeth hon
fy llongwriaeth i
dy longwriaeth di
ei longwriaeth ef/o
ei llongwriaeth hi
ein llongwriaeth ni
eich llongwriaeth chi
eu llongwriaeth nhw/hwy
External

Dictionary Portal

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

Specialist Dictionaries
Glossaries
Terminology
Encyclopedia
Example Sentences
Sentences containing:

*External websites will be opened in a new window.