pagpapanumbalik ... why is 'pa' repeated? why is -num- used? I u

hmm ... your question is very interesting: Maybe the prefix is "pagpa" (a prefix I did not know yet) ... and then "pagpapa" could be a future form ... balik is an UM-verb ... and so the past would be bumalik ... but this is NOT numbalik ... I have asked my filippino friends for help ... they told me: Pagpapanumbalik is to restore - restoration - like turn back times Pagpapanumbalik sa dating hugis. (Whatever that means) ? So obviously this form exists .... this is the only positive thing to say about the whole matter. But of course, they dont give any explanations. Maybe some Tagalog native speakers will be able to solve the problem ...