impermanent

Adjective (2)

1. not permanent; not lasting“politics is an impermanent factor of life — James Thurber”“impermanent palm cottages”“a temporary arrangement”“temporary housing”Synonyms: temporaryOpposite lastingSimilar ephemeral, acting, temporal, interim, improvised, working, pro tem, terminable +4 moreRelates to permanence, permanencySee also unstable
2. existing or enduring for a limited time onlyOpposite infiniteSimilar finite