This word itself likely originated from the Latin word "vexare", which also means "to annoy, trouble, or harass".
So, the lineage of the word "vexed" can be traced back through:
* Old French: "vexer"
* Latin: "vexare"
It's interesting to note that the word "vexed" has a slightly different meaning today. While it still carries the connotation of being annoyed or troubled, it now often refers to something that is difficult, confusing, or problematic.
The word "vexed" has been used in English for centuries, and its meaning and usage have evolved over time.