To maintain or support oneself, especially at a minimal level. Many families in the rural area subsist on farming and small-scale trade.
To continue to exist; to remain in being. The ancient traditions still subsist in some remote villages.
To remain valid or in effect. The contract will subsist even if the company is restructured.
To provide with food or other necessities of life; to sustain or maintain (transitive, chiefly archaic). During the long siege, the commander managed to subsist the troops with supplies brought in by night.