indeclinable “greeting of welcome,” hail! DN.i.179 = MN.i.481 (sāgataṃ bhante Bhagavato); DN.ii.173; MN.i.514 (˚aṃ bhoto Ānandassa) DN-a.i.287; Dhp-a.iii.293.

su + āgata, orij. nt. = wel-come