inexhaustible
1. [ adjective ] that cannot be entirely consumed or used up
Synonyms: unlimited
Examples:

"an inexhaustible supply of coal"

Related terms: infinite
2. [ adjective ] incapable of being entirely consumed or used up
Examples:

"an inexhaustible supply of coal"

Related terms: exhaustible unfailing renewable
Similar spelling:   inexhaustibly
  inexcusable
  inexcusably
  inexactitude