Mercilessly : ক্ষমাহীনভাবে;
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Appropriate Prepositions
Concerned with(জড়িত): She was concerned with such things.
Drop to (নিচে নামানো): Asif dropped his voice to a whisper.
Hinge on/upon (নির্ভর করা): The whole matter hinges upon this clue.
Short of (অপর্যাপ্ত): I am running short of money.
Take pity on (দয়া করা): Take pity on the helpless people.
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Idioms
On the whole (মোটের ওপর): On the whole, his conduct is good.
Stone’s throw (অতি নিকটে): Our school is at a stone’s throw from our house.
Salt of the earth (গুরুত্বপূর্ণ ব্যক্তিবর্গ) —The salt of the earth is remembered always.
Three R's (প্রাথমিক শিক্ষা)— He has not yet learnt the three R's.
With a lavish hand (মুক্ত হস্তে)— Give away something with a lavish hand.