Unproductive : অফলপ্রসূ; নিষ্ফলা;
Related Words
unpredictable  unproductive  See Words Also In
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Appropriate Prepositions
Careful of(যত্নশীল থাকা): Sadia is careful of her health.
Desire for (কামনা): He has no desire for fame.
Faithful to (বিশ্বস্ত): The dog is very faithful to its master.
Object to (প্রতিবাদ করা): Many people objected to the remarks of the leader.
Sad at (দুঃখিত): All his colleagues were very sad at his transfer from this place.
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Idioms
Do yeoman’s service (বিশেষ উপকার করা): Freedom fighters have done yeoman’s service for country.
Fair play (প্রতারণা বিহীন নীতি বা কাজ): I believe in the practice of fair play in my business.
In black and white – (লিখিতভাবে) – Put forward your proposal in black and white.
Make hay while sun shines (ঝোপ বুঝে কোপ মারা) You should try to make hay while sun shines.
White color job – (উচ্চ শ্রেনীর চাকরি, যেখানে শারীরিক কাজ নেই বললেই চলে- a job without manual labour) - He wants a white color job.