Word study: adunare
In the Roman Canon, the priest asks God to accept the gifts quae tibi offerimus pro Ecclesia tua sancta catholica: quam pacificare, custodire, adunare et regere digneris toto orbe terrarum.
aduno,are: to unite, to make one
We can see the word un nestled in there, which means one in several romance languages. The prophet Ezekiel speaks of the days to come when God will gather again and unite Israel: Hæc dicit Dominus Deus : Congregabo vos de populis, et adunabo de terris in quibus dispersi estis, daboque vobis humum Israël / Thus says the Lord : I will gather you from the peoples, and I will unite you from the lands in which you were dispersed, and I will give you the land of Israel (Ez 11:17).