'sporadically-forbidden' is a compound word formed from 'sporadically' and 'forbidden'. 'Sporadically' originates from the Greek word 'sporadikós', meaning 'scattered'. 'Forbidden' comes from Old English 'forboden', meaning 'prohibited'.

The term 'sporadically' evolved from the Greek 'sporadikós' through Latin 'sporadicus' and eventually into English. 'Forbidden' evolved from Old English 'forboden', which was influenced by the Germanic root 'forbeodan'.

Initially, 'sporadically' meant 'scattered' and 'forbidden' meant 'prohibited'. The compound term 'sporadically-forbidden' retains these meanings, indicating something that is occasionally prohibited.