in English is:

subsidence

Mutations

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

Use

yr ymsuddiant hwn
fy ymsuddiant i
dy ymsuddiant di
ei ymsuddiant ef/o
ei hymsuddiant hi
ein hymsuddiant ni
eich ymsuddiant chi
eu hymsuddiant nhw/hwy
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