'idealistically-guided' is a compound formed from 'idealistically' and 'guided'. 'idealistically' ultimately traces to Greek via Latin and French: 'ideal' originates from Greek 'idea', where 'idea' meant 'form' or 'appearance'; the adjectival suffix '-istic' and adverbial '-ally' come via Latin/French/English formations. 'guided' comes from Old French 'guider' (to lead), from a Germanic root meaning 'to lead' or 'show the way'.

'ideal' entered English via Latin/French from Greek 'idea' and developed into 'ideal' in Middle English; 'idealistic' and then 'idealistically' were formed in Modern English by adding suffixes. 'guide' entered English from Old French 'guider' (and related Germanic sources), producing the past participle 'guided' in later Middle English; combining 'idealistically' + 'guided' produced the modern compound 'idealistically-guided'.

Originally 'idea' meant 'form' or 'appearance' in Greek; over time it came to mean a mental concept or principle ('ideal'), and the compound now means 'directed by those ideals' rather than referring to physical form or appearance.