The practice of lending money to people at unfairly high rates of interest -

• Usury
English Meaning: the practice of lending money to people at unfairly high rates of interest
Bangla Meaning: সুদখোরি; সুদের কারবার; কুসীদ ব্যবহার; চড়া সুদ। a usury transaction; a usury rate of interest, 

Synonyms: Moneylending (টাকা ধার ধেয়া), Interest (সুদ), Exploitation (শোষণ করা), Stealing (আত্মসাৎ করা)। 
Antonyms: Generosity (উদারতা), Unselfishness (নি:স্বার্থ), Honest (সৎ), Benevolent (পরোপকারী), Righteous (ন্যায়পরায়ণ)। 

Other Forms: - 
- Usurer (Noun) চড়া সুদে ঋণ প্রদান করা মহাজন। 
- Usurious (Adjective) চড়া সুদযুক্ত।  

Example Sentence: 
1. He used to practice usury frequently.
2. Delaware wasted no time in trashing its usury law as well.

Options,
- Toady: A person who is too kind or shows too much respect towards somebody more important in order to gain their favour or help.
- Proliferate: To increase a lot and suddenly in number.
- Subpoena: To order someone to go to a law court to answer questions. 

Source: Website Lecture.