Xenembole is a rare word that refers to a situation in which an individual is the target of repeated acts of hostility, aggression or malice. This term is made up of the Greek roots "xeno" meaning stranger or foreigner, and "embole" meaning attack. The correct pronunciation of xenembole is /zenɛmbol/ with the stress on the first syllable. The "x" at the beginning of the word is pronounced like a "z" sound in this case, as it is common in Greek words starting with "x".
The introduction of a foreign body or foreign substances into the system.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.