'appeachment' originates from Middle English, specifically the word 'appechen', where 'appech-' meant 'to accuse'.

'appeachment' changed from Middle English 'appechen' (itself influenced by Old French apeschier/apechier, meaning 'to accuse') and eventually became the modern English noun 'appeachment' by adding the nominal suffix '-ment'.

Initially, it meant 'the action of accusing (formally)', and over time it has come to denote specifically 'a formal accusation or charge (especially against a public official)'.