'agrammatologia' originates from Greek, specifically the word 'agrammatos,' where 'a-' meant 'without' and 'grammatos' meant 'letters' or 'grammar.'

'agrammatos' transformed into the modern English term 'agrammatologia' to describe a specific language disorder.

Initially, it meant 'without grammar,' but over time it evolved into its current meaning of 'a condition characterized by the inability to construct grammatically correct sentences.'