The definition of irk is to annoy.
(verb)See irk in Webster's New World College Dictionary
transitive verb
Origin: ME irken, to loathe, be weary of, akin to northern & N Midland adj. irk, yrk, weary, troubled < ? ON yrkja, to work
See irk in American Heritage Dictionary 4
transitive verb irked, irk·ing, irks
Origin:
Origin: Middle English irken, to weary
Origin: , possibly from Old Norse yrkja, to work, make verses, harangue; see werg- in Indo-European roots
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