Not concerned with right or wrong; lacking moral principles or values.
From a- (without) + moral. The 'a-' prefix comes from Greek meaning 'without,' attached to 'moral' from Latin 'moralis' relating to customs and behavior.
There's a weird difference between 'amoral' (no morals at all, like a rock or a toaster) and 'immoral' (actively doing wrong)—psychopaths are sometimes called amoral because they lack the conscience mechanism entirely.
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