persistent

Despite xanthommatin's fantastic color properties, it is poorly understood due to a persistent supply challenge.

The combination of persistent inflation and surging house prices argues strongly for the RBA to stay on the sidelines for an extended period.

They are persistent pollutants which build up in the environment, and a small number have been linked to increased risk of some serious illnesses.

Two regional Federal Reserve presidents expressed reservations about further interest rate cuts, citing persistent inflation.

On the other hand, she expressed impatience with persistent inflation, noting that prices already rose nearly at the Fed’s annual target rate between January and August alone.