Unproductive : অফলপ্রসূ; নিষ্ফলা;
Related Words
unpredictable  unproductive  See Words Also In
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Appropriate Prepositions
Adequate for(পর্যাপ্ত): The loan given by the bank is not adequate for the farming project.
Anxious about (কোনো কিছুর ব্যাপারে চিন্তিত বা উদ্বিগ্ন): Karim is anxious about his father’s death. Karim is anxious for getting a job.
Break in (কথার মাঝে কথা বলা): As she was talking, he suddenly broke in, saying, ‘that’s a rat!’
Famous for (বিখ্যাত): Smith is famous for his wisdom.
Play with (খেলা করা/ মজা করা): I shall not play with him.
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Idioms
Brown study (day dream-দিবাস্বপ্ন -n) The woman is absorbed in a brown study.
Crocodile tears (মায়াকান্না): He shed crocodile tears at our misery.
Hold water (ধোপে টেকা): This policy will not hold water in this situation.
Pass away (মারা যাওয়া)— He passed away last night.
Square meal (পেট ভরা আহার): He is too poor to have a square meal everyday.