what is perish
Strong's says this for parish
G622
From G575 and the base of G3639; to destroy fully (reflexively to perish, or lose), literally or figuratively: - destroy, die, lose, mar, perish.
Please forgive if this reads argumentative it is not meant so..
Here is the example of a very, very, common mistake and thye folks doing so, almst never see it for themselves. The Strongs is a very valuable study reference but we must never let it define words to the point they lose their contextual reference.
Remembering, always, the Bible is of one context from beginning to end and is authored by one, supreme, God. Perish in the first and prior centuries did not always mean what the Strongs explains to us any more than it does today. if You come in to your kitchen and I'm there with a quarter glass of milk and the Cookie Dish is empty and I reply to your question that the Snicker Doodles perished, You will not immediately assume the passed over and I have been one kind dude and buried them for you...I hope, anyway.
In this passage Jesus, being the Son of God, knew he was dealing with a Pharisee that was daily tormented by various Sadducees trying to convince him that the end of this body was the end of all life and He used a term he would readily associate with. And then we must also consider the body, as we know and understand it, does cease to be for both the Lost and the Saved. The bodies we know right now will never survive natural nor spiritual fire. No, just as we, the Saved, receive the Glorified and eternal Bodies so it must, surely, be with the Lost that they are not resurrected without some form of eternal body.
The very thought of this truth is so offensive to many people and I never expect it not to be, I could never imagine me doing this to anyone... wellllll, maybe Ho Chi Minh. But remember, we are not God and our ways are not God's ways.