Where does “[[ὄχι]], [[ὤχι]]” come from?

[[ὄχι]], [[ὤχι]] (Byzantine Greek) comes from Ancient Greek [[οὐ.

Ancestry of “[[ὄχι]], [[ὤχι]]”, step by step

Step	Language	Word	Meaning
1	Ancient Greek	[[οὐ	—

[[ὄχι]], [[ὤχι]] — Etymology, Origin & Word History | Etymology Explorer