IPA: /ˌɪndɪˈstrʌktəbl/
KK: /ˌɪndɪˈstrʌktəbl/
Something that cannot be destroyed or damaged, no matter what happens to it.
The superhero's indestructible shield protected him from all attacks.
Indestructible → It is formed from "in-" (meaning not) and "destructible" (from Latin "destruere", meaning to tear down or destroy, combined with the suffix "-ible", meaning capable of). The word "indestructible" means not capable of being destroyed.
Think of 'not' ('in-') being able to 'tear down' ('destruere') something — that's why indestructible means it cannot be destroyed.