unfamiliar
/ʌnfəˈmɪljər/
adjective
- Not known or recognized; not previously encountered.
- She heard an unfamiliar sound coming from the basement.
- The new student felt lost in the unfamiliar hallways of the school.
- The recipe called for an unfamiliar spice that she had never used before.
- Not having knowledge or experience of something (often followed by 'with').
- Many people are unfamiliar with the history of that ancient city.
- He was unfamiliar with the rules of the game.
- I am unfamiliar with this software, so I need some training.