'caustic-resistant' originates from modern English, formed by combining the adjective 'caustic' and 'resistant'. 'caustic' originates from Greek, specifically the word 'kaustikos', where 'kaiein' meant 'to burn'; 'resistant' originates from Latin, specifically the word 'resistere', where 're-' meant 'back' and 'sistere' meant 'to stand.'

'caustic' changed from Greek 'kaustikos' to Latin 'causticus' and passed through French 'caustique' before entering modern English as 'caustic'. 'resistant' changed from Latin 'resistere' through Old French 'resister' into English 'resistant'. The compound 'caustic-resistant' arose in modern technical English by combining these established elements.

Initially, 'caustic' meant 'capable of burning' and 'resistere' meant 'to stand back'; over time these roots came together in technical compounds to express the modern sense 'resistant to caustic (corrosive) substances'.