'sporadically-displayed' originates from the combination of 'sporadic' and 'displayed'. 'Sporadic' comes from the Medieval Latin 'sporadicus', meaning 'scattered', and 'displayed' is derived from the Old French 'despleier', meaning 'to unfold'.

'Sporadicus' transformed into the English word 'sporadic', and 'despleier' evolved into 'displayed' in modern English.

Initially, 'sporadic' meant 'scattered or dispersed', and 'displayed' meant 'unfolded or shown'. Together, they convey the idea of something being shown irregularly.