in English is:

incidence of tax

Mutations

Soft:bwysfan trethiant
Nasal:mhwysfan trethiant
Aspirate:phwysfan trethiant

Use

y pwysfan trethiant hwn
fy mhwysfan trethiant i
dy bwysfan trethiant di
ei bwysfan trethiant ef/o
ei phwysfan trethiant hi
ein pwysfan trethiant ni
eich pwysfan trethiant chi
eu pwysfan trethiant nhw/hwy
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