The Islamic Arabic word Zulm may be translated as "wrong-doing."
'Wrong-doing' consists in withholding someone's rights and the wrong-doer is one who withholds those rights from their legitimate claimants. Anyone who disobeys God withholds three major rights.
The first is what is due to God, for He has the right to be obeyed.
Second, there are the rights of all those things which a man employs in disobeying God. The parts of his body, his mental energy, his fellow-beings, those angels who, under Divine dispensation, have been appointed to enable him to achieve his aims. both righteous and unrighteous, the material objects which he employs in his acts of disobedience - all these have a rightful claim upon him to be used in ways that please God. But when he uses them in ways which displease God he commits wrong against them all.
Third, he wrongs his own self which has the right to be saved from perdition. By inviting punishment from God because of his disobedience he wrongs his own self as well. It is for these reasons that the word 'wrong' is often used in the Qur'an for sin, and the word 'wrong-doer' for sinner.