xenophobic (adj.)

"fear or hatred of strangers or what is foreign," 1880, London Daily News, April 12, in which it is coupled with xenomania, in reference to English attitudes toward the French:

Here, however, as in other cases, we are inclined to think that intelligent xenomania is decidedly preferable to the Xenophobia which is of necessity and always unintelligent.

See xeno- "foreign, strange" + -phobia "fear." It was infrequent in 1890s publications but more common from 1903, influenced by or from French xénophobie (by 1901), xénophobe. Earlier (c. 1884) it meant what is now meant by agoraphobia.

Middle English -ik, -ick, word-forming element making adjectives, "having to do with, having the nature of, being, made of, caused by, similar to," from French -ique and directly from Latin -icus or from cognate Greek -ikos "in the manner of; pertaining to." From PIE adjective suffix *-(i)ko, which also yielded Slavic -isku, adjectival suffix indicating origin, the source of the -sky (Russian -skii) in many surnames. In chemistry, indicating a higher valence than names in -ous (first in benzoic, 1791).

In Middle English and after often spelled -ick, -ike, -ique. Variant forms in -ick (critick, ethick) were common in early Modern English and survived in English dictionaries into early 19c. This spelling was supported by Johnson but opposed by Webster, who prevailed.