Sustained by one's own efforts, inherent power, or strength of mind.
The Century Dictionary (Public Domain)
Use "self-sustained" in a sentence
"By the summer of 2010 the disinflationary bias in expectations had become more evident, and the economy -- lacking a self-sustained recovery -- had started heading toward a dangerous stall speed."
""Global share prices are unlikely to show a self-sustained rally on fundamentals alone," Mr. Morita said."
"I definitely enjoyed it more than The Black Dossier, which I felt was a bit too clever by half, but it was a quick read, and definitely felt like the first chapter in an ongoing story rather than a self-sustained tale."