MUT-UK

mut-uk (from but-uk) v [b2] be dumbfounded, be struck speech-less because of the sudden impact of words or events.
Hingmut-ukan (namut-ukan) ku sa ímung nutisya kay mu rag dì katuúhan ang nahitabù, I was struck dumb by your news because it sounded unbelievable.
mutùmútù = tumùtúmù.