IPA: /ɪnˈfræŋɡəbl/
KK: /ɪnˈfræŋɡəbl/
Something that cannot be broken or divided; it is unbreakable or inviolable.
The infrangible bond between the two friends kept them together through thick and thin.
Infrangible → It is formed from "in-" (meaning not) and "frangere" (meaning to break). The word "infrangible" means not able to be broken or unbreakable.
Think of something that is 'not' ('in-') able to be 'broken' ('frangere') — that's why infrangible means unbreakable.