This is the 1462nd most frequent Japanese word.
罪
Sin; crime; guilt.
In this sentence, '罪' (tsumi) refers to the concept of a wrongdoing or a sin, emphasizing the moral or ethical violation that is being atoned for.
彼は犯した罪を償うために努力しています。
He is striving to atone for the sins he committed.
Here, '罪' is used as an abstract noun representing moral wrongdoings or feelings of guilt that one reflects upon and repents.
彼女は罪を悔やむ心を持っています。
She has a heart that repents her sins.
In this usage, '罪' refers to a legal infraction or crime, relating to the judicial context of responsibility or culpability.