'philosophy-friendly' originates from Modern English, specifically the compound of the noun 'philosophy' (from Greek 'philosophia') and the adjective 'friendly' (from Old English 'frēondlic'), where 'philosophia' meant 'love of wisdom' and 'frēond' meant 'friend'.

'philosophy' passed from Greek 'philosophia' into Latin and then Middle English as 'philosophye'/'philosophie', while 'friendly' developed from Old English 'frēondlic' (from 'frēond'); the compound 'philosophy-friendly' is a modern English formation combining these elements to describe something congenial to philosophy.

Individually, 'philosophy' originally meant 'love of wisdom' and 'friendly' meant 'characteristic of a friend'; together in modern usage they form a compound whose current meaning is 'favorable or accessible to philosophical thought'.