'seldom-displayed' originates from the combination of 'seldom' and 'displayed'. 'Seldom' comes from Old English 'seldan', meaning 'rarely', and 'displayed' is the past participle of 'display', which comes from Old French 'despleier', meaning 'to unfold'.

'Seldom' changed from the Old English word 'seldan' and 'displayed' evolved from the Old French 'despleier', eventually forming the modern English compound adjective 'seldom-displayed'.

Initially, 'seldom' meant 'rarely' and 'displayed' meant 'unfolded'. Over time, 'displayed' evolved to mean 'shown', and the compound adjective 'seldom-displayed' now means 'rarely shown'.