This is the 5883rd most frequent Arabic word.
نسب
Lineage, kinship, or relation.
In this sentence, the word "نسب" is used as a verb meaning "attributed," showing a relation between the success and its cause.
نسب الطالب نجاحه إلى تعبه واجتهاده.
The student attributed his success to his hard work and diligence.
Here, "نسب" is used in the noun form referring to "lineage" or "ancestry," indicating the family's heritage.
تشتهر هذه العائلة بشرف نسبها.
This family is renowned for the nobility of their lineage.
In this case, "نسب" is used as a plural noun meaning "shares" or "proportions," related to the distribution of profits.