sustained
v. B2 Upper Intermediate US //səˈsteɪnd// UK //səstˈeɪnd// sus·tained
v. continuing for a long time without stopping or becoming weaker. You use this to describe something that stays at a steady, strong level.
v. maintained at a consistent level or intensity over a prolonged period. Often used to describe effort, growth, or physical forces.
The athlete's sustained effort helped her win the race.
The company saw sustained growth in sales over the last five years despite the difficult economy.
The aircraft was unable to maintain sustained flight at high altitudes due to a mechanical failure in the cooling system.
Usage
Typically used as an attributive adjective before a noun; can also function as the past participle of the verb 'sustain'.