stranger

That gentleman is a stranger to me.  Children are taught not to talk to strangers.

I am a most poor woman and a stranger, / Born out of your dominions.

[…] St. Bede's at this period of its history was perhaps the poorest and most miserable parish in the East End of London. Close-packed, crushed by the buttressed height of the railway viaduct, rendered airless by huge walls of factories, it at once banished lively interest from a stranger's mind and left only a dull oppression of the spirit.

Hello, stranger!

To honour and receive / Our heavenly stranger.

Actual possession of land gives a good title against a stranger having no title.