undervoice
overvoice
mutter
undersing
croak
oversoft
oversour
flimsily
overlax
spraff
destroy
overspeak
overweak
stick in someone's throat
mouth
overlow
weakheartedly
can't carry a tune in a bucket
blart
shipwrecky
overmeek
overstrenuously
overdaintily
deep-throated
chunter
outcry
shoal
yawp
punk
sour
susurrant
whisper
underarticulate
murmur
underetch
squall
underspeak
wussify
faintly
weak-mindedly
overword
gasbaggery
overloud
piss-weak
overheavily
toothily
talk someone under the table
mewl
get going
coarsen
under one's breath
wail
lower than a snake's belly
weakish
pule
babble
shallowly
milk-and-water
overmild
pathetically
whimper
overstand
yell
yabble
scabbily
insipidly
worse
watery
underreach
asininely
scream
twaddlingly
weakhearted
blab
drivel
overslight
stony-heartedly
weak as water
voice for print
hoarse
frailly
overhardy
low
oversing
humbly
weak-handed
overwordy
acidulate
evirate
wisht as a winnard
ashenly
decline
gruff
wisht
talk a mile a minute
discordant
meanly