inexhaustible

/ɪnɛgˈzɑstɪbəl/

/ɪnɛgˈzɔstɪbəl/

When something is inexhaustible, you'll never run out of it. If your grandfather appears to have an inexhaustible supply of nostalgic stories, it seems like he could tell them forever.

Unfortunately, if the kids you're babysitting have inexhaustible amounts of energy, they are never going to fall asleep. But if you've got an inexhaustible supply of Disney movies for them to watch, you'll be able to keep them distracted until their parents come home. This adjective combines the prefix in-, "opposite of," and exhaustible, from the Latin exhaurire, "take away, use up, or empty." So when something can't be used up, it's inexhaustible.

Definitions of inexhaustible

1. adjective

   incapable of being entirely consumed or used up
   “an inexhaustible supply of coal”

   synonyms:

   renewable

   capable of being renewed; replaceable

   unfailing

   always able to supply more

   antonyms:

   exhaustible

   capable of being used up

   depletable

   capable of being depleted
2. adjective

   that cannot be entirely consumed or used up
   “an inexhaustible supply of coal”

   synonyms: unlimited

   infinite

   having no limits or boundaries in time or space or extent or magnitude