'expectedly-sustained' is a compound word formed from 'expectedly' and 'sustained'. 'Expectedly' originates from the Latin 'expectare', meaning 'to look out for', and 'sustained' comes from the Latin 'sustinere', meaning 'to hold up'.

'Expectedly' evolved from the Old French 'expecter', and 'sustained' from the Old French 'soustenir'. The combination of these words into 'expectedly-sustained' is a modern English formation.

Initially, 'expectedly' meant 'in a manner that was anticipated', and 'sustained' meant 'maintained'. The combination retains these meanings in modern usage.