'unusually-changed' is a compound word formed from 'unusual' and 'changed'. 'Unusual' originates from the Latin word 'usualis', meaning 'customary', with the prefix 'un-' indicating negation. 'Changed' comes from the Old French 'changier', meaning 'to alter'.

'Unusual' evolved from the Latin 'usualis' through Old French 'usuel', while 'changed' evolved from Old French 'changier'. The combination of these words into 'unusually-changed' is a modern English construct.

Initially, 'unusual' meant 'not customary', and 'changed' meant 'altered'. The combination retains these meanings, indicating something altered in a non-customary way.