The word thus began as referring to a type of person, a woman-person,and not a type of man. Over time, the ‘f’ in ‘wif’ fell away and the resultwas a word we now pronounce as ‘wimmin.’ There was no ‘woman.’ Yet. Thesingular ‘woman,’ as opposed to the plural ‘women,’ came about in MiddleEnglish
for - etymology - woman - interesting that the word "man" at one time referred to a person of either male or female sex - essentially a person, - and how hoistory has modified it to mean a person of male gender.