Enunciation is being able to identify and produce the specific sound of the vowels and consonants properly. Hence enunciation is the clarity and precision of how a vowel or consonant sound should be produced. Example: Simply knowing how to dance is like pronunciation. On the other hand, how well the dance should be executed is enunciation.
Why did pronunciation, annunciation, enunciation, renunciation all change their vowel for the verbs pronounce, announce, enounce, renounce? The answer lies in how we acquired them from Old French, where the verbs already had Latin’s u changed to o and which we later diphthonged, but where the differently stressed nouns did not.
Australian Broadcasting Corporation: Program: A Word in Your Ear: Pronunciation & Enunciation
Nonenunciate seems like the better answer as Non means not. I've been researching for quite a bit now and it seems that there is no invented word for the opposite of enunciation. There was a result for the Urban Dictionary when I searched disenunciate on Google, but I'm not comfortable with using the Urban Dictionary for references on this website.
X | enunciation | x | x | enunciate It is scarcely more defensible to say that " pronounciation " is wrong than to say that " enunciate " should be replaced by " enounce " or " announcement " by the more venerable " annunciation ". Contra the top answer, pro-NOUN-ciation is a fine pron (o)unciation, as it is common and easily-understood.
Disjuncts are often found at the initial position in a sentence, although they can appear in any position, which is in keeping with a full enunciation of the sentence as below.