Answer:

subsist

Answer	Crossword Clue
SUBSIST	Stay alive
SUBSIST	Get by
SUBSIST	Have the means to live.

SUBSIST	Continue to be.
SUBSIST	Remain alive
SUBSIST	Support
SUBSIST	Get by (on)

Crossword

a puzzle consisting of a grid of squares and blanks into which words crossing vertically and horizontally are written according to clues.