'regionally-restricted' originates from the combination of 'regionally' and 'restricted'. 'Regionally' comes from 'region', which originates from Latin 'regio', meaning 'direction, district'. 'Restricted' comes from Latin 'restringere', meaning 'to bind back'.

'Regionally' evolved from the Latin 'regio' through Old French 'region', while 'restricted' evolved from Latin 'restringere' through Old French 'restricter'.

Initially, 'regionally' meant 'pertaining to a region', and 'restricted' meant 'bound back'. Together, they evolved to mean 'limited to a specific region'.