inflation-proof
adjective
ECONOMICS,FINANCEukusan inflation-proofinvestment,pension, etc. is one whosevalueincreasesbasedon therateofinflation:
Risk-free, inflation-proofpensionspromisedtopublicsectorworkerswillcosttaxpayersabout £470billiontofundin thedecadesahead.