'unjustly-cancelled' originates from the combination of 'unjustly' and 'cancelled'. 'Unjustly' comes from the prefix 'un-' meaning 'not' and 'just' meaning 'fair'. 'Cancelled' is the past participle of 'cancel', which originates from Latin 'cancellare', meaning 'to cross out'.

'Unjustly' evolved from Middle English 'unjust', and 'cancelled' from Middle English 'cancellen', which was derived from Old French 'canceller'.

Initially, 'cancel' meant 'to cross out', but over time it evolved to mean 'to annul or invalidate'. 'Unjustly' has retained its meaning of 'not fair'.