'puna' means again. 'later' means 'pacchaa'. If the venerable would translate 'see you later' into paa.li, it will look like this: aha.m tva.m pacchaa passaami.
When you see a monk coming from somewhere, venerable would ask "Kuto aagato Bhante?" It can mean 'Where are you from Ven. Sir?' as well as 'Ven. sir, where are you "coming" from'
similarly, Aha.m ___ nagaraa/ra.t.thaa aagato. I come from/I am coming from ___ city/country.