To prevent an activity from making progress at its previous rate' can be termed as -

• Impede (Verb transitive)
English Meaning: To slow something down or prevent an activity from making progress at its previous rate.
Bangla Meaning: ব্যাহত/বাধিত/বাধাগ্রস্থ করা; বাধা দেওয়া।

Synonyms: Delay (বিলম্ব/দেরি করা), Obstruct (বাধা দেওয়া), Retard (দমন করা), Hinder (বাঁধাগ্রস্থ করা), Obstruct (প্রতিবন্ধকতা সৃষ্টি করা)। 
Antonyms: Facilitate (সহজ করা), Help (সাহায্য করা), Aid (সহায়তা), Assist (সহায়তা করা), Ease (সহজ করা)। 

Other Forms: Impeder (noun).

Example Sentence: 

1. As I tried to enter the concourse, a slow person was impeding my progress.
2. He claims that economic growth is being impeded by government regulations.

Options,
- Divest: To get rid of an investment, part of a business, etc. by selling.
- Facetious:  Not seriously meaning what you say, usually in an attempt to be humorous or to trick someone.
- Emulate: To copy someone’s behavior or try to be like someone else because you admire or respect that person.

Source: Website Lecture.