Fundamental principle : মূলসূত্র; মূল নীতি; মূলতত্ত্ব;
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Appropriate Prepositions
Adorn with(সাজানো/সজ্জিত করা): Adorn the car with flowers.
Ascend to (আরোহণ করা): karim began to ascend to the surface of wakefulness.
At lunch (দুপুরের খাবারে): They were talking so much at lunch that their food went cold.
Indifferent to (উদাসীন): Everybody is indifferent to my problem.
Married to (বিবাহিত): Salma was married to a Govt. Officer.
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Idioms
In one’s teens (তের থেকে উনিশ বছর বয়সের মাঝে): She is yet in her teens.
Irony of fate (ভাগ্যের পরিহাস): He could not succeed by irony of fate.
Slip of the tongue (বলায় সামান্য ভুল): This is a slip of the tongue; don’t pay much stress on it.
Speed money (ঘুষ; উৎকোচ): He hankers after speed money.
White color job – (উচ্চ শ্রেনীর চাকরি, যেখানে শারীরিক কাজ নেই বললেই চলে- a job without manual labour) - He wants a white color job.