IPA: /ˌʌn.rɛk.əɡˈnaɪ.zə.bli/
KK: /ʌnˈrɛkəɡnəblɪ/
In a way that cannot be recognized or identified; to such an extent that something is no longer recognizable.
The landscape had changed unrecognizably after the storm.
Unrecognizably → It is formed from "un-" (meaning not), "recognize" (from Latin "recognoscere", meaning to know again), and "-ably" (meaning in a manner). The word means in a manner that cannot be known again or identified.
Think of 'not' ('un-') being able to 'know again' ('recognize') — that's why 'unrecognizably' means something that cannot be identified.