The Greek that is often translated as «evil» in English has the option of various terms in Luang with different shades of meaning.

For Acts 24:9 and Gen. 6:11, yata-hala («bad-wrong»). «This term refers to evil behavior.»

For Acts 27:12, yota-yata («bad-bad»). «This term refers to the evil results of behavior or to objects of poor quality. (In Acts 27:12 it refers to a bad harbor).»

For Acts 12:11 and 13:50, yatyatni («its badness»). «This term is often used when evil comes on a person from an outside force.»

Source: Kathy Taber in Notes on Translation 1/1999, p. 9-16.