Ah OK so the problem really is this term verbal markers When the preposition ann an is followed by a possessive determiner the two words form a contraction This also occurs with the verbal markers ag related to the preposition aig and aL The resulting forms have the same effects on the following word lenition consonant insertion as the possessive determiners After all ag is the preposition aig and this particular a the a dh one is the preposition ado  To me when you say verbal marker I think of the other leniting a  me tha mi ri rudeigin a dheanamh  as this is something that only seems to be used with verbs  At the very least theres two things a so the article needs to specify which one its talking about