'bisyllabic' originates from Medieval Latin, specifically the word 'bisyllabus,' where 'bi-' meant 'two' and 'syllabus' meant 'syllable.'

'bisyllabic' changed from the Medieval Latin word 'bisyllabus' and eventually became the modern English word 'bisyllabic.'

Initially, it meant 'having two syllables,' and this meaning has remained the same in modern usage.