'sporadically-enforced' originates from modern English, specifically from the adverb 'sporadically' and the past participle 'enforced'.

'sporadically' comes via 'sporadic' from Greek 'sporadikos' (from 'spora' meaning 'sowing, scattering'), and 'enforce' developed from Old French (e.g. 'enforcier'/'enforcer') and Middle English forms derived from elements meaning 'to force'. These parts combined in modern English to form the compound adjective 'sporadically-enforced'.

Initially, the components referred separately to the idea of 'occurring at intervals' ('sporadic') and 'to compel or apply' ('enforce'); over time they combined to mean 'applied only occasionally or irregularly'.