'reason-centered' originates from the combination of 'reason' and 'centered', where 'reason' comes from Latin 'rationem', meaning 'reckoning, understanding', and 'centered' from Latin 'centrum', meaning 'center'.

'Reason' evolved from Old French 'raison', and 'centered' from Old French 'centrer', eventually forming the modern English term 'reason-centered'.

Initially, 'reason' meant 'reckoning or understanding', and 'centered' meant 'placed at the center'. Together, they evolved to mean 'focused on reason'.