1) Defect of speech 2) Loss of articulate speech 3) Speech defect 4) Speech disorder 
Anarthria is a genus of flowering plant species endemic to Southwest Australia. ...
Strictly speaking, a total inability to carry out a skilled muscle movement, or, in the context of communication, a total inability to produce speech. 
Loss of the power of articulate speech. ... See: aphasia, alexia, dysarthria. ... Origin: G. Fr. An-anthos, without joints; (of sound) inarticulate ... (05 Mar 2000) ... 
(an-ahr´thre-ә) severe dysarthria resulting in speechlessness.
Type: Term Pronunciation: an-ar′thrē-a Definitions: 1. Loss of the power of articulate speech.
[n] - partial or total loss of articulate speech resulting from lesions of the central nervous system
anarthria Loss of articulate speech.
noun partial or total loss of articulate speech resulting from lesions of the central nervous system
loss of articulate speech.