What comes to mind for me is dormant, specifically the verb phrase to lie dormant.

Here's an excerpt from Merriam-Webster's definition of dormant (apologies for formatting issues, I'm on mobile):

marked by a suspension of activity: such as a: temporarily devoid of external activity a dormant volcano b: temporarily in abeyance yet capable of being activated seeds will remain dormant until spring reawaken her dormant emotions

Also this remark:

DORMANT suggests the inactivity of something (such as a feeling or power) as though sleeping. their passion had lain dormant

And this example from the web:

Steamboat lay dormant from October 1991 to May 2000 and from February 2007 to July 2013.

There's some synonyms listed there that might be useful as well.

dormant, specifically the verb phrase to lie dormant.

Here's an excerpt from Merriam-Webster's definition of dormant (apologies for formatting issues, I'm on mobile):

marked by a suspension of activity: such as

• a: temporarily devoid of external activity : "a dormant volcano"
• b: temporarily in abeyance yet capable of being activated : "seeds will remain dormant until spring", "reawaken her dormant emotions"

Merriam-Webster also offers this remark:

DORMANT suggests the inactivity of something (such as a feeling or power) as though sleeping. their passion had lain dormant

And provides this example from the web:

[The] [s]teamboat lay dormant from October 1991 to May 2000 and from February 2007 to July 2013.

There's some synonyms listed that might be useful as well.