aphasic
Concise Oxford English Dictionary © 2008 Oxford University Press:
aphasia /əˈfeɪzɪə/
▶noun Medicine inability to understand or produce speech as a result of brain damage.
– derivatives
aphasic adjective & noun.
aphasic adjective & noun.
– origin C19: from Gk, from aphatos ‘speechless’.
'aphasic' also found in these Oxford entries:

