Not feminine, not appropriate for a woman.(adjective)
Wiktionary.org : Text is available under the Creative Commons Attribution-ShareAlike License
Use "unfeminine" in a sentence
"But, such prices are hard to resist, and apparently this has started the downward trend in the way we dress: "cheap, convenient, ugly, immodest and unfeminine" is easier than sewing your own appropriate clothing."
"She would do nothing that could be thrown in her teeth; nothing that could be called unfeminine, indelicate, or undutiful."
"But being openly ambitious was considered unfeminine, and to be called unfeminine was the worst insult."