Unmerciful : নির্মম; ক্ষমাহীন; অত্যধিক; নিষ্ঠুর; অকরুণ; নির্দয়; দয়াহীন;
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unmerciful  unmercifully  See Words Also In
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Appropriate Prepositions
Aptitude for(স্বাভাবিক দক্ষতা, যোগ্যতা): He has no aptitude for public service.
Arrange for(ব্যবস্থা করা): We have arranged everything for our study tour.
Congenial to(উপযোগী): The atmosphere is congenial to your health.
Control over(নিয়ন্ত্রণ): He has no control over his sons.
Similar to (সদৃশ): My T-shirt is similar to yours.
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Idioms
Acid test (অগ্নি পরীক্ষা): You must succeed in the acid test of the time you live in.45
Lion’s share (বড় মাপের অংশ): He took the lion’s share of the profit.
Look into something (তদন্ত করা- investigate) - The manager looked into the matter.
Through thick and thin (through all difficulties, সমস্ত সমস্যার মধ্যে)-Ruma followed her husband through thick and thin.
Weal and woe (সুখ-দুঃখ): Human life is full of weal and woe.