balbutient (adj.)

"stuttering, stammering," 1640s, from Latin balbutientem (nominative balbutiens), present participle of balbutire "to stammer," from balbus, from a PIE imitative root indicating meaningless stammering (compare Sanskrit balbala-karoti "stammers," Greek bambalyzein "to have chattering teeth," Lithuanian balbasyti, "to chatter," Serbo-Croatian blabositi, Czech beblati "to stammer").