in English is:

building work

Mutations

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

Use

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