Word Study
aphasia
CIDE DICTIONARY
aphasia, n. [NL. aphasia, Gr. , fr. not spoken; 'a priv. + to speak: cf. F. aphasie.].
Loss of the power of speech, or of the appropriate use of words, the vocal organs remaining intact, and the intelligence being preserved. It is dependent on injury or disease of the brain. [1913 Webster]
OXFORD DICTIONARY
aphasia, n. Med. the loss of ability to understand or express speech, owing to brain damage.
Derivative
aphasic adj. & n.
Etymology
mod.L f. Gk f. aphatos speechless f. a- not + pha- speak
THESAURUS
aphasia
anaudia, aphonia, aphrasia, deaf-muteness, dumbness, dysarthria, dysphasia, echolalia, hysterical aphonia, imperfect speech, inarticulateness, incoherence, jargon aphasia, loss of speech, motor aphasia, muteness, mutism, paranomia, paraphasia, psychophonasthenia, speech defect, speechlessness, tonguelessness, verbigeration, voicelessness, wordlessnessFor further exploring for "aphasia" in Webster Dictionary Online