Relating to, affected by, or characteristic of epilepsy; describing something connected to seizure disorders.
From Greek 'epileptikos' (seizing) + '-al' (relating to), derived from 'epilambanein' (to seize). An older or more formal variant of the adjective 'epileptic.'
The shift from 'epileptical' to 'epileptic' shows how English loves to trim unnecessary letters—older texts use the longer form, but modern English prefers the shorter version, a pattern that happens across the language as words age and common usage wins out.
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