Strong's G3424 — μογιλάλος (adjective)
mogilalos (mog-il-al'-os) adj.
1. hardly talking, i.e. dumb (tongue-tied)
[from G3425 and G2980]
KJV: having an impediment in his speech 
Root(s): G3425, G2980 
Hebrew root: λαλέω
Occurrences: 1