UK /əˈfeɪzɪə/noun (mass noun) (Medicine)inability (or impaired ability) to understand or produce speech, as a result of brain damage.

mid 19th century: from Greek, from aphatos ‘speechless’, from a- ‘not’ + phanai ‘speak’

mid 19th century: from Greek, from aphatos ‘speechless’, from a- ‘not’ + phanai ‘speak’