Strange (adjective)

1. Not previously known, seen, or experienced; unfamiliar.
2. Differing from the ordinary in a way that is unsettling or not easily explained.
3. Having an unusual or unexpected quality.

Origin:

Middle english, from old french estrange, from latin extraneus, from extra outside.

Examples:

1. The strange noises in the middle of the night scared her.
2. She found it strange that no one had noticed the mistake.
3. He has a strange sense of humor.
4. The strange feeling of déjà vu was overwhelming.
5. The strange creature was unlike anything she had ever seen before.