Speculation : অনুধ্যান; বিবেচনা;
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Appropriate Prepositions
Adequate to(সমানুপাতিক): The salary, he gets, is not adequate to the volume of work he has to do.
Akin to(সমজাতীয়): These are akin to one another.
Ask for (কোনো কিছু চাওয়া): Do not ask him for any help because he doesn’t like to help anyone.
Convince of(বিশ্বাস হওয়া): I am convinced of your efficiency.
Fantasize about (কল্পনা করা): They fantasized about winning the lottery.
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Idioms
At last (in the end – অবশেষে) He tried hard, and at last, succeeded in achieving his goal.
Bring to light (disclose-প্রকাশ করা) The police brought the secret to light.
Put the cart before the horse (to reverse the natural order of things-কোনো জিনিসের স্বাভাবিক ক্রমকে পাল্টে দেয়া) - The leader put the cart before the horse.
Riding for a fall (বেপরোয়াভাবে কাজ করা- to act recklessly): He rides for a fall in the election.
Short temper (রগচটা)— He is a man of short temper.