'non-arbitral' originates from English, formed by the negative prefix 'non-' and the adjective 'arbitral', where 'arbitral' ultimately derives from Latin 'arbiter' meaning 'judge' or 'one who gives judgment'.

'arbitral' comes via Medieval Latin/Old French from Latin 'arbiter' (judge); the modern English adjective 'arbitral' developed from these forms, and 'non-arbitral' is a modern negation formed by adding 'non-'.

Initially related to an 'arbiter' or judge; over time 'arbitral' came to mean 'relating to arbitration', and 'non-arbitral' now means 'not relating to or handled by arbitration'.