heavily(TO A GREAT DEGREE)
accented
He called out in his heavily accented French.
He spoke heavily accented but fluent English.
I have a hard time understanding heavily accented voices over the phone.
Their Japanese was heavily accented, but clear.
SMART Vocabulary: related words and phrases
Ways of speaking
accented
accentual
accentuation
aitch
articulate
asperity
asyndetic
asyndetically
bray
fluent
intone
mispronounce
non-verbal
non-verbally
orthoepy
paralanguage
pragmatics
pronounce
singsong
toned