The spelling of the word "un makes" is derived from the prefix "un-" which means the opposite of or not. It is pronounced as /ʌn/ in IPA phonetic transcription, with the "u" sounding like the "u" in "up" and the "n" being silent. The suffix "-makes" is pronounced as /meɪks/, with the "a" sounding like the "a" in "hay" and the "e" sounding like the "e" in "bed". Hence, the word "un makes" means to undo or reverse a previous action.
There is no word "un makes" in the English language. It seems to be a combination of the prefix "un-" which is used to reverse the meaning of a word, and the word "makes" which is the third person singular form of the verb "make". Therefore, the etymology of the word "un makes" would be the Germanic origin of "make" combined with the use of the "un-" prefix in English.