in English is:

mediastinum

Mutations

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

Use

y mediastinwm hwn
fy mediastinwm i
dy fediastinwm di
ei fediastinwm ef/o
ei mediastinwm hi
ein mediastinwm ni
eich mediastinwm chi
eu mediastinwm nhw/hwy
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