'peace-minded' originates from Modern English, specifically a compound of 'peace' and 'minded', where 'peace' ultimately comes from Old French 'pais' (from Latin 'pax') meaning 'tranquility, absence of war', and 'minded' is formed from 'mind' (Old English 'gemynd') meaning 'thought, disposition'.

'peace' changed from Old French 'pais' (itself from Latin 'pax'), and 'mind' developed from Old English 'gemynd' meaning 'memory/thought'; the adjective form 'minded' arose from native English formations (past-participial/adjectival use of 'mind'), and the two elements were combined in Modern English to form the compound 'peace-minded'.

Initially the components referred separately to 'peace' (absence of conflict) and 'mind' (thought/disposition); over time they were combined in Modern English to mean 'disposed toward peace' or 'favoring peaceful methods'.