• The antonym of "Rapacious" is - Restrained.

• Rapacious (adjective)
English Meaning: aggressively greedy or grasping.
Bangla Meaning: লোভী; লোলুপ (বিশেষত অর্থলোলুপ); অন্য প্রাণী শিকারের মাধ্যমে জীবনধারণকারী; হিংস্র।
Example sentence: She is badmouthed for her rapacious appetite for fame.

• Restrained (adjective)
English Meaning: Acting in a calm and controlled way.
Bangla Meaning: (বিশেষ করে) নিরাবেগ; নিয়ন্ত্রিত।
Example sentence: I was expecting him to be furious but he was very restrained.

• অন্য অপশনগুলোর মধ্যে -
• Greed (noun)
English Meaning: A very strong wish to continuously get more of something, especially food or money
Bangla Meaning: লোভী; লোভাতুর
Example sentence: I don't know why I'm eating more - it's not hunger, it's just greed!

• Reverent (adjective)
English Meaning: Showing great respect and admiration.
Bangla Meaning: শ্রদ্ধাভাবাপন্ন; শ্রদ্ধান্বিত; শ্রদ্ধাশীল।
Example Sentence: I was not very reverent or respecting of myself in the early days.

• Whimsical (adjective)
English Meaning: Unusual and strange in a way that might be funny or annoying.
Bangla Meaning: বাতিকগ্রস্ত; খেয়ালি; অদ্ভুত।
Example Sentence: The question is whimsical, but perhaps it illustrates something.

Source:
1. Accessible Dictionary by Bangla Academy.
2. Cambridge Dictionary.
3. Merriam-webster Dictionary.
4. Live MCQ Lecture.