IPA: /ˈbɪznɪsˌwʊmən/
KK: /ˈbɪznəsˌwʊmən/
A woman who works in business or is involved in commercial activities.
The businesswoman successfully negotiated a deal with the new client.
Businesswoman → It is formed from "business" (from Old English *bisig*, meaning busy or occupied) and "woman" (from Old English *wīfmann*, meaning female human). The word "businesswoman" refers to a woman who is engaged in commercial or professional activities.
Think of a woman who is 'busy' ('business') with her work — that's what a businesswoman is.
No commonly confused words.