'habitually' originates from Latin, specifically the word 'habitualis,' where 'habit' meant 'custom or practice.' 'Executed' originates from Latin, specifically the word 'executus,' where 'ex-' meant 'out' and 'sequi' meant 'to follow.'

'habitualis' transformed into the Old French word 'habituel,' and eventually became the modern English word 'habitual.' 'Executus' transformed into the Old French word 'executer,' and eventually became the modern English word 'execute.'

Initially, 'habitual' meant 'pertaining to a habit,' and 'execute' meant 'to carry out.' Over time, 'habitually-executed' evolved to mean 'performed regularly as a habit.'