Perfunctory : উদাসীনভাবে বা অনিচছার সঙ্গে কৃৃত;
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Appropriate Prepositions
Bar to(বাধা): Poverty is not a bar to happiness.
Catch at(ধরা): A drowning man catches at a straw.
Count on/upon (নির্ভর, বিশ্বাস করা): Rahim count on (upon) my help.
Depend upon (নিশ্চিত থাকা, আস্থা রাখা): Sumi depended upon his word.
Remedy for (প্রতিকার): There is no remedy for his misbehavior.
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Idioms
Irony of fate (ভাগ্যের পরিহাস): He could not succeed by irony of fate.
Null and void (বাতিল): The deed has been null and void now.
Pack up a quarrel (ঝগড়া মিটানো)— He packed up their quarrel.
Put up with (সহ্য করা - tolerate): I could not put up with his behavior.
Three R's (প্রাথমিক শিক্ষা)— He has not yet learnt the three R's.