Here, returning officers who believe they live in "Koom-ree", learners making plucky stabs at Welsh, and what sounded like first-language speakers apparently unaware that "mil" is a feminine noun, and that both "dau" and "dwy" produce a soft mutation
In an environment for soft mutation, an initial /g/ in the canonical form of a word deletes, giving zero.
One context in which soft mutation is triggered is on feminine singular nouns following the definite article.
The paradox, then, is that selection of y/yr in (42) must be sensitive to the phonological shape of the feminine singular noun resulting from soft mutation, yet the noun only undergoes the mutation because it follows the definite article.
In (44), the interrogative marker a is a trigger for soft mutation, and the mutation occurs whether or not the slot for the trigger is overtly filled.
This string contains a trigger for another type of initial mutation: the morpheme yn 'in' triggers nasal mutation (nasal in standard Welsh; some speakers generalize soft mutation to this context).
The conjunction/complementizer na is a trigger for soft mutation, which means that a canonically /g/-initial word can become vowel-initial following na: for instance, under soft mutation, the verb gofynnodd 'asked' becomes ofynnodd.
However, I appreciate that old habits die hard and some would wish to continue using the pronunciation of their youth, and I still hear Pontarddulais emerging as Pontardulais, ignoring the soft mutation