bachelor
noun
[ ˈbatʃələ ]
• a man who is not and has never been married.
• "one of the country's most eligible bachelors"
• a person who holds a first degree from a university or other academic institution (only in titles or set expressions).
• "a Bachelor of Arts"
• a bachelor apartment.
• "it's just one room, a bachelor"
• a young knight serving under another's banner.
Origin:
Middle English: from Old French bacheler ; of uncertain origin.