that's your fucked up make believe word, dumb ass.
No, it is the English spelling duck.
We did invent the language.
You yanks messed it up.
im⋅mu⋅nize –verb (used with object), -nized, -niz⋅ing. 1. to make immune.
2. to render harmless or ineffective; neutralize.
3. Law. to grant (a witness) immunity.
Also, especially British, im⋅mu⋅nise.