Unproductive : অফলপ্রসূ; নিষ্ফলা;
Related Words
unpredictable  unproductive  See Words Also In
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Appropriate Prepositions
Annoyed with(ব্যক্তির সাথে বিরক্ত হওয়া): I am annoyed with him.
Consist in (কোনো কিছু মধ্য বিদ্যমান থাকা): Happiness consists in contentment.
Effect of (প্রভাব): The effect of corruption is very harmful for our society.
Hope for (আশা করা): Let us hope for the best.
Work for (কারো জন্য কাজ করা): She works for a construction company.
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Idioms
Back and forth (to and fro-এদিক ওদিক – adv.) The mad man was walking back and forth in the doctor’s chamber.
Fair play (প্রতারণা বিহীন নীতি বা কাজ): I believe in the practice of fair play in my business.
In one’s teens (তের থেকে উনিশ বছর বয়সের মাঝে): She is yet in her teens.
Tooth and nail (strongly, প্রবলভাবে)-He fought tooth and nail against his enemy.
Up and doing (উদ্যোগী): Be up and doing and then you will succeed in your life.