'hastily-formed' originates from the combination of 'hastily,' derived from the Old English 'hæstlice,' meaning 'quickly,' and 'formed,' from the Latin 'formare,' meaning 'to shape or create.'

'hastily' evolved from the Old English 'hæstlice,' while 'formed' came from the Latin 'formare,' through Old French 'former,' eventually becoming the modern English 'form.'

Initially, 'hastily' meant 'quickly or speedily,' and 'formed' meant 'to shape or create,' which has largely remained the same in modern usage.