'restrictedly-kept' originates from the combination of 'restrictedly' and 'kept', where 'restrictedly' is derived from 'restrict', meaning 'to limit', and 'kept' is the past participle of 'keep', meaning 'to hold or retain'.

'restrictedly' evolved from the Latin word 'restrictus', meaning 'bound tightly', and 'kept' from the Old English 'cepan', meaning 'to seize or hold'.

Initially, 'restrictedly' meant 'in a limited manner', and 'kept' meant 'held or retained'. Together, they convey the idea of being held in a controlled manner.