Unproductive : অফলপ্রসূ; নিষ্ফলা;
Related Words
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Appropriate Prepositions
Adapt for (উপযোগী করে নেওয়া): This book has been adapted for the children.
Angry with(কারো সাথে ক্রুদ্ধ হওয়া): The teacher was very angry with the students.
Enter into (কোনো কিছুতে আবদ্ধ হওয়া): pma entered into a new agreement.
Indifferent to (উদাসীন): Everybody is indifferent to my problem.
Regret for (দুঃখ করা): We regretted for his failure.
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Idioms
At dead of night (গভীর রাতে) The police caught the thief at dead of night.
At death’s door (at the point of death- মৃত্যুর দ্বারে) The patient is now at death’s door.
Liable to mislead (প্রতারণাপূর্ণ- deceptive): Appearances can often be liable to mislead.
Make hay while sun shines (ঝোপ বুঝে কোপ মারা) You should try to make hay while sun shines.
To the point (সঠিক) - The boy answered the question to the point.