'regularly-supplied' originates from the combination of 'regularly' and 'supplied', where 'regularly' comes from Latin 'regularis' meaning 'consistent' and 'supplied' from Latin 'supplere' meaning 'to fill up'.

'regularly' changed from the Latin word 'regularis' and 'supplied' from 'supplere', eventually forming the modern English compound adjective 'regularly-supplied'.

Initially, 'regularly' meant 'in a consistent manner' and 'supplied' meant 'provided', and this meaning has largely remained the same in modern usage.