Merge.
weith/iau i'r / mor / a / weith / iau i'r/ myn/ydd.
weith / yire / more / a / weith / yire / muhn / ith. ('th' as in 'the')
I'm not good at this phonetic stuff!
And I just realized you said something about 9 syllables. You mean 8, right?
sian