stam·mer 
/ˈstæmɚ/ verb
stam·mers; stam·mered; stam·mer·ing /ˈstæmɚ/ verb : to speak with many pauses and repetitions because you have a speech problem or because you are very nervous, frightened, etc. [no obj] ▪ He stammers [=stutters] when he's nervous. [+ obj] ▪ “I d-don't know what you're talking about!” she stammered. ▪ He stammered an excuse and fled.
— stammer noun [singular]
▪ He develops a stammer [=stutter] when he's nervous.
▪ He develops a stammer [=stutter] when he's nervous.
— stam·mer·er /ˈstæmɚrɚ/ noun, plural stam·mer·ers [count]
/ˈstæmɚrɚ/ noun, plural stam·mer·ers [count]
