"Unbeknownst" Natural Recordings by Native Speakers
Meaning: Unknown or unsuspected by someone; unexpected or unforeseen.
Example: "I was unaware of the new policy, but it was announced unbeknownst to me."
The word "unbeatable" refers to something or someone that cannot be defeated, overcome, or surpassed. It describes a level or quality that is extremely high or unmatched, making it impossible to compete with or better.