catalydd

(hwn) noun masculine (catalyddion)
in English is:

catalyst

Mutations

Soft:gatalydd
Nasal:nghatalydd
Aspirate:chatalydd

Use

y catalydd hwn
fy nghatalydd i
dy gatalydd di
ei gatalydd ef/o
ei chatalydd hi
ein catalydd ni
eich catalydd chi
eu catalydd nhw/hwy
yr un catalydd
y ddau gatalydd cyflym*
y tri chatalydd pell*
y pedwar catalydd tawel*
y pum catalydd bach*
y chwe chatalydd da*
y saith catalydd glân*
yr wyth catalydd llawn*
y naw catalydd mawr*
y deg catalydd rhyfedd*

* These adjectives were chosen based on their initial letter in order to demostrate their mutations, and therefore their meaning will not make sense after some nouns!

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