Tom Sawyer stepped forward with conceited confidence and soared into the unquenchable and indestructible "Give me liberty or give me death" speech, with fine fury and frantic gesticulation, and broke down in the middle of it.
There are no more uses of "indestructible" in the book.
Show samples from other sources
When the fear takes over, use the only thing more powerful, more indestructible, to fight it: your spirit.
Sabaa Tahir -- An Ember in the Ashes
"Nick, don’t let one good turn make you feel indestructible," Go said.