Je was op zoek naar: consonant mutation (Engels - Wels)

consonant mutation
treiglad

consonant
cytsain

aspirate mutation
treiglad

to correct the mutation error in the terms of reference.{\i }
cywiro’r gwall treiglo yn y cylch gorchwyl.

we must also acknowledge that mental illness is not an act of god , nor an abhorrent consequence of genetic mutation nor a metabolic abnormality
rhaid inni hefyd gydnabod nad gweithred duw yw salwch meddwl na chanlyniad ffiaidd newid genetig nag abnormaledd metabolaidd

a mutation is not needed after every preposition, only after the prepositions in the rhyme 'am, ar, at'. for example, there is no need to mutate after these common prepositions:
does dim angen treiglo ar ôl pob arddodiad dim ond ar ôl yr arddodiaid yn rhigwm 'am, ar, at'. er enghraifft, does dim angen treiglo ar ôl yr arddodiaid cyffredin hyn: