aphasic
aphonic
dumb
incoherent
mute
silent
speechless
tongue-tied
tongueless
unarticulated
unspoken
voiceless
wordless
Greek to one
ambiguous
anaudic
bashful
beyond understanding
blurred
breathless
breathy
choked
choking
confused
conscious
coy
croaking
demure
digressive
discursive
disjointed
drawling
drawly
dumbfounded
dumbstricken
dumbstruck
dysphonic
faltering
garbled
guttural
halting
harsh
hawking
hesitating
hoarse
illogical
impenetrable
implicit
implied
incognizable
incomprehensible
indistinct
inferred
inscrutable
irrational
jumbled
lisping
maundering
mispronounced
audible
frantic
gruff
heartfelt
husky
hysterical
inaudible
incredulous
involuntary
irrepressible
piteous
raucous
soundless
articulate
particulate