Something (mag-) becomes the final, last, ultimate of something.
ultimo
Magoltimo dananchiw bago kwaw an delak.
Tomorrow will become the last (day) for my pig (before I sell or kill it).
Someone does something to the extreme, utmost (i-).
i- iyoltimo
Iyoltimo mwayas kalyak radyo mwaya.
You (make) the volume of your radio to the extreme.
Iyoltimo mwayaw mangngey.
You shout to the extreme.
Someone puts an end to something (pag--en).
Pagoltimohen ko tarabāko kwaw.
I put an end to my work (by finishing it).
Pagoltimohen ko amongaya.
I put an end to the fish (by killing it or eating it).