Prelusive and Undying

Prelusive adjective - Coming before the main part or item usually to introduce or prepare for what follows.

Undying and prelusive are semantically related. In some cases you can use "Undying" instead an adjective "Prelusive".

Undying adjective - Having an existence or validity that does not change or diminish.

Prelusive and undying are semantically related. Sometimes you can use "Prelusive" instead an adjective "Undying".