in English is:

truancy

Mutations

Soft:driwantiaeth
Nasal:nhriwantiaeth
Aspirate:thriwantiaeth

Use

y driwantiaeth hon
fy nhriwantiaeth i
dy driwantiaeth di
ei driwantiaeth ef/o
ei thriwantiaeth hi
ein triwantiaeth ni
eich triwantiaeth chi
eu triwantiaeth nhw/hwy
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