wrongdoing (n.)

"that which is improper or unjust," late Old English, from wrong (adj.). Meaning "an unjust action" is recorded from c. 1200. Wrong-doer is from late 14c.

"a thing done, a feat or action, good or bad," early 13c., verbal noun from do (v.). From early 14c. as "performance or execution of something." In the former sense, now usually in plural, doings. From c. 1600-1800 it also was a euphemism for "copulation."