xeno- or xen-
1. Stranger; foreigner: xenophobia.
2. Strange; foreign; different: xenolith.
[New Latin, from Greek, from xenos, stranger; see ghos-ti- in the Appendix of Indo-European roots.]
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2018 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.