Or alternatively, "something in which you're always able to find/discover something new".

An example:

A book, which you read multiple times, and every time you read it, you

  • see a whole new aspect of something, e.g. about the plot,
  • notice some detail that you haven't noticed before,
  • understand some joke you haven't understood before.

... and other features that make a book more rereadable, or timeless.

Another example:

A computer game, which you play over and over, and you always seem to

  • discover new possibilities about what the game allows you to do,
  • find new locations in the in-game world that you haven't found before,
  • notice some intentionally hidden message or joke, i.e. an Easter egg.

... and other features that increase replayability.

Is there a single adjective describing this property?

  • A fount of freshness and new ideas.
    – WS2
    Jan 7 '15 at 18:52
  • Assuming you have a large supply of air, unfathomable. (the depth metaphor) Jan 7 '15 at 23:22
  • 1
    If you think of each newly discovered aspect of the thing as a different facet of it, then multifaceted makes a pretty good (though modest) adjective for indicating its multitudinous aspects and its limitless capacity to surprise and edify you.
    – Sven Yargs
    Jan 7 '15 at 23:34
  • @SvenYargs Multifaceted is pretty close to what I'm looking for.
    – zenith
    Jan 8 '15 at 1:11

I would describe it as having depth or being deep; or extensive (or extensively replayable, for a game), if it covers a great range of things, or gives you a lot to do or think about; or perhaps profound if it causes you to keep pondering new things.



renew - (v tr) - to make (something) new, fresh, or strong again, (v intr.) to become new again. TFD


"ever-fresh". Ever-fresh. Ever-fresh? Ever-fresh!


When things are dynamic, new changes and fresh energy are always in the air.



Having interest and meaning:

His history lessons are alive with fresh perspective.




Favouring or introducing new and experimental ideas and methods:



1. bearing, producing, or capable of producing vegetation, crops, etc., abundantly; prolific: fertile soil.
2. bearing or capable of bearing offspring.
3. abundantly productive: a fertile imagination.
4. producing an abundance (usually followed by of or in): a land fertile of wheat.
5. conducive to productiveness: fertile showers.
Source: dictionary.com definition for “fertile”


1. producing offspring, young, fruit, etc., abundantly; highly fruitful: a prolific pear tree.
2. producing in large quantities or with great frequency; highly productive: a prolific writer.
3. profusely productive or fruitful (often followed by in or of): a bequest prolific of litigations.
4. characterized by abundant production: a prolific year for tomatoes.
Source: dictionary.com definition for “prolific”


1. having the power of producing; generative; creative: a productive effort.
2. producing readily or abundantly; fertile: a productive vineyard.
3. causing; bringing about (usually followed by of): conditions productive of crime and sin.
Source: dictionary.com definition for “productive”

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