subsist (verb) - to live or survive, often at a minimum level; to remain or continue in existence; to be sustained [suhb-sist]
BREAKDOWN: SUB- (from below) + SIST- (to cause to stand)
subsistence is the act or state of maintaining minimum requirements for survival; existence, continuation, or sustenance
subsistent means real or existing; inherent
See also: existential
“Class war is not the cause of social progress; it is a disease developed in the course of social progress. The cause of the disease is the inability to subsist, and the result of the disease is war.” —Sun Yat-sen