IPA: /nɒn.dɪˈstrʌk.tɪv/
KK: /nɑnˈdɪstrʌktɪv/
Relating to a method or process that does not cause any damage to the material being examined or tested.
The engineers used nondestructive testing to ensure the integrity of the bridge without harming it.
Nondestructive → It is formed from "non-" (meaning not) and "destruct" (from Latin "destruere", meaning to tear down or destroy) and the suffix "-ive" (meaning having the nature of). The word "nondestructive" means having the nature of not tearing down or destroying something.
Think of 'not' ('non-') destroying ('destruct') something — that's why nondestructive means it doesn't cause damage.