verb
subsist
sub-SIST/səbˈsɪst/
To maintain continued existence.
Many families subsist on small incomes from seasonal farm work.

Etymology
With sistere meaning to stand still or remain, the compound expressed standing firm or holding out. English moved from continuing to exist to supporting oneself—the basis of surviving on basic necessities.
In context
For, without the help of Sir Richard, we that live in the [00:13:00] Islands could not subsist; for he is the best branch of our trade,
More examples
- We subsisted on rice and beans until payday.
- These desert plants subsist on very little water.
- Mutual trust cannot subsist without honest communication.
Forms
subsist · subsists · subsisted · subsisting
subsistence noun — Survival with only life's basic necessities.