'justifiably-cancelled' originates from the combination of 'justifiably' and 'cancelled'. 'Justifiably' comes from 'justify', which originates from Latin 'justificare', meaning 'to make just'. 'Cancelled' comes from Latin 'cancellare', meaning 'to cross out'.

'Justifiably' evolved from the Old French 'justifier', and 'cancelled' from the Old French 'canceller'.

Initially, 'justifiably' meant 'to make just', and 'cancelled' meant 'to cross out'. Over time, 'justifiably-cancelled' evolved to mean 'cancelled for a valid reason'.