dysphasia
noun
dys·pha·sia dis-ˈfā-zh(ē-)ə 
: loss of or deficiency in the power to use or understand language as a result of injury to or disease of the brain
dysphasic
dis-ˈfā-zik
noun or adjective 
Example Sentences
Recent Examples on the Web One resident, a 72-year-old Marine Corps veteran, died of septic shock stemming from an untreated urinary tract infection, dysphasia and pneumonia: complications spurred by improper medical care and neglect. 
Dana Ferguson, Twin Cities, 24 Sep. 2019 Brayson had been diagnosed with fragile X syndrome, pervasive developmental disorder, attention deficit hyperactivity disorder, impulse control disorder and dysphasia, according to records obtained by IndyStar. Marisa Kwiatkowski, Indianapolis Star, 31 May 2018
Dana Ferguson, Twin Cities, 24 Sep. 2019 Brayson had been diagnosed with fragile X syndrome, pervasive developmental disorder, attention deficit hyperactivity disorder, impulse control disorder and dysphasia, according to records obtained by IndyStar. Marisa Kwiatkowski, Indianapolis Star, 31 May 2018 Word History
Etymology
borrowed from French dysphasie, from dys- + -phasie (in aphasie aphasia)
Note: Perhaps first suggested by the physician and librarian René-Marie Briau (1810-86), in a note entitled "Aphémie et aphasie," published in the Gazette hebdomadaire de médecine et de chirurgie, vol. 1, no. 6 (February 5, 1864), pp. 95-96. The note was Briau's reaction to the controversy over the two terms aphémie et aphasie (see note at aphasia).
First Known Use
circa 1883, in the meaning defined above
Medical Definition
dysphasia
noun
dys·pha·sia dis-ˈfā-zh(ē-)ə
: loss of or deficiency in the power to use or understand language as a result of injury to or disease of the brain compare dysarthria