'Iniquity' in the Bible

Is the iniquity of Peor too little for us, from which we have not cleansed ourselves to this day, although there came a plague on the congregation of Yahweh,

Didn't Achan the son of Zerah commit a trespass in the devoted thing, and wrath fell on all the congregation of Israel? That man didn't perish alone in his iniquity.'"