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1. Uttered without the use of normal words or syllables; incomprehensible as speech or language: "a cry ... that ... sank down into an inarticulate whine" (Jack London).
2. Unable to speak; speechless: inarticulate with astonishment.
3. Unable to speak with clarity or eloquence: an inarticulate debater.
4. Going unexpressed: inarticulate sorrow.
5. Biology Not having joints or segments.

in′ar·tic′u·late·ly adv.
in′ar·tic′u·late·ness, in′ar·tic′u·la·cy (-lə-sē) n.
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References in classic literature ?
Jerry, who heard, registered, and recognized many words that were as truly tools of thought to him as they were to humans, but who, by inarticulateness of birth and breed, could not utter these many words, nevertheless in his mental processes, used images just as articulate men use words in their own mental processes.
He was confused, painfully conscious of his inarticulateness.
Human and Machine Causes of Inarticulateness 1992 3.
Len is a working-class male with traditional expectations, especially around issues of sexuality and the conduct of relationships, but he is plagued by ill health, a violent temper and--in contrast to his letters --an extreme inarticulateness.
Pinker cites research done on patients who have been reduced to inarticulateness by a condition known as 'aphasia.
M09: "Because of my inarticulateness, I cannot explain my works well.
In the case of children, the biologist would likely point out that human beings begin life in a state of relative helplessness and inarticulateness.
In a realm where athletes often battle inarticulateness as well as their opponents, Ali was known as the Louisville Lip and loved to talk, especially about himself.
followed by "that someone something") the formulaic yet private utterance with which we approach the unsayable, its inarticulateness akin to cry, prayer, frustration.
In both her fiction and personal life, Yezierska's desire to be heard by educators only seemed to exacerbate her feeling of inarticulateness and insecurity.