When it comes to things or memories that we want to hold onto forever, there are numerous synonyms to describe this feeling. "Treasure," "cherish," "preserve," "hoard," and "retain" are just a few options. Each of these words conveys the idea of keeping something with care and intending to keep it for the long-term. Other synonyms that express a similar sentiment include "maintain," "conserve," "protect," and "safeguard." Regardless of the word used, the meaning behind the phrase "keep forever" is one that reflects a deep desire to hold onto something that is valuable to us for as long as we possibly can.