A hard nut to crack : কঠিন সমস্যা; যে লোককে সহজে টলানো যায় না;
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Appropriate Prepositions
Akin to(সমজাতীয়): These are akin to one another.
Make from (কোনো উপকরণ দ্বারা সরাসরি তৈরী নয় বোঝাতে): Paper is made from bamboo.
Rid of (মুক্তি দেওয়া): He will get rid of troubles soon.
Rule over (শাসন করা): In the absence of the Parliament, the President rules over the country.
Succeed in (সাফল্য লাভ করা): He succeeded in life.
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Idioms
All at once - (হঠাৎ): I feel terribly sleepy all at once.
At one’s elbow (near at hand — হাতের কাছে – adv.) His private secretary is always at his elbow.
In the wake of (ঠিক পরে): Police came in the wake of the accident.
Slow coach (অলস): You cannot expect much from a slow coach.
Steer clear of (avoid, দূরে থাকা)— You must steer clear of evil company.