'sporadically-prohibited' is a compound word formed from 'sporadically' and 'prohibited'. 'Sporadically' originates from the Greek word 'sporadikós', meaning 'scattered'. 'Prohibited' comes from Latin 'prohibitus', meaning 'to hold back'.

'Sporadically' evolved from the Greek 'sporadikós' through Late Latin 'sporadicus' and eventually into English. 'Prohibited' transformed from Latin 'prohibitus' into Old French 'prohiber', and then into English.

Initially, 'sporadically' meant 'scattered or dispersed', and 'prohibited' meant 'to hold back'. Together, they convey the idea of something being occasionally forbidden.