balbutire (to stammer; also to speak hesitatingly and indistinctly; from want of confidence; opposed to aperte et clara voce dicere, Cic.): titubare (to stumble, etc., of witnesses who get confused; Cic., Auct. ad Her., subdola lingua titubat, Ov.): titubanter et inconstanter loqui de aliqua re (Auct. ad Her., 4, 41, 53): labare sermone (Plin., 14, 22, 82; to speak with an unsteady or uncertain voice, from hesitation, etc.): haerere (to be at a loss; to stick fast). To speak without faltering, aperte et clara voce dicere (Cic.).