'anapaestically' originates from English, specifically from the word 'anapaest' with the suffix '-ic' and '-ally', where 'anapaest' referred to a metrical foot in poetry.

'anapaest' comes from Latin 'anapaestus', from Greek 'anapaistos', meaning 'struck back', and the adverbial form 'anapaestically' was formed in English by adding '-ic' and '-ally'.

Initially, it meant 'in the manner of an anapaest', and this meaning has remained consistent in modern usage.