If you cast aspersions on someone, you -

• If you cast aspersions on someone, you - make damaging remarks about them.

• Cast aspirations on someone/something: 
English meaning: To criticize or make damaging remarks or judgments about someone or something.
Bangla meaning: কুৎসা করা; কটাক্ষপাত করা।

• Examples:
- His opponents cast aspersions on his patriotism.
- The critics cast aspersions on their achievements.
- She felt hurt when they cast aspersions on her abilities.
- The rival team cast aspersions on their victory.

Source:
1. Accessible Dictionary by Bangla Academy.
2. Cambridge Dictionary.