'approval-guided' is a compound word formed from 'approval' and 'guided'. 'Approval' originates from the Latin word 'approbare', where 'ad-' meant 'to' and 'probare' meant 'to test or prove'. 'Guided' comes from the Old English 'gīdan', meaning 'to lead or direct'.

'approval' evolved from the Latin 'approbare' through Old French 'aprover', and 'guided' from Old English 'gīdan'.

Initially, 'approval' meant 'to test or prove', but over time it evolved to mean 'to accept or endorse'. 'Guided' has largely retained its original meaning of 'to lead or direct'.