to confuse, prove wrong, frustrate, or express frustration
in various senses, including:confuse or surprise — sometimes specifically to confuse one thing with another
"confounded by the puzzle" — confused or perplexed
"Test results confounded the experts." — surprised and confused
"Do not confound confidence with correctness." — mistake one thing for another
prove wrong, defeat, or frustrate
"The test results confounded my theory." — proved wrong
"Their defense confounded our offense." — defeated or frustrated
"She confounded the problem by painting without sanding." — made worse
"The task is complicated by other confounding factors." — making worse
an exclamation expressing anger or frustration
"Confound it! Will I ever get this thing to work?"
"I don't understand the confounded directions!"
O, confound the rest!
3.2 — Act 3 Scene 2 — A hall in the Castle (48% in)
He would drown the stage with tears And cleave the general ear with horrid speech; Make mad the guilty, and appal the free; Confound the ignorant, and amaze, indeed, The very faculties of eyes and ears.
2.2 — Act 2 Scene 2 — A room in the Castle (93% in)
There are no more uses of "confound" in Hamlet, Prince of Denmark.