flowers are not perpetual.
There is no such word.
The ocean floor is in perpetual darkness.
Flowers are not perpetual.
The universe is perpetual as we know of so far.
The inner reaches of the cave were in perpetual darkness.
In this case, you would use the word 'more' in front of 'perpetual' to indicate the comparative form.
Antonyms of the word "temporary" could be permanent, perpetual, eternal, or everlasting.
perpetual
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that bird is theirs.
the story has a narrate