BT Sot 22a(7) :ראטין אמגושא ולא ידע ^מאי^ דראטין‏ : the magian priest mumbles (a charm) and does not know what he is mumbling
See the entire entry for mḡūš, mḡūšā n.m. magus

BT Sot 22a(7) :ראטין אמגושא ולא ידע ^מאי^ דראטין‏ : the magus utters a charm, and he does not know what he is mumbling
See the entire entry for rṭn vb. to murmur