'unbiasedly-managed' originates from the combination of 'unbiasedly' and 'managed'. 'Unbiasedly' comes from 'unbiased', which is derived from the prefix 'un-' meaning 'not' and 'biased', which comes from the Old French 'biais', meaning 'slant'. 'Managed' is the past participle of 'manage', which originates from the Italian 'maneggiare', meaning 'to handle'.

'Unbiasedly' evolved from 'unbiased', which was influenced by the Old French 'biais'. 'Managed' evolved from the Italian 'maneggiare', which was adopted into English as 'manage'.

Initially, 'unbiased' meant 'not slanted', and 'manage' meant 'to handle'. Over time, 'unbiasedly-managed' came to mean 'managed without bias'.