Dielectric : অস্তরক;
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Appropriate Prepositions
Anxious about (কোনো কিছুর ব্যাপারে চিন্তিত বা উদ্বিগ্ন): Karim is anxious about his father’s death. Karim is anxious for getting a job.
Apply to (কারো কাছে আবেদন করা): He applied to the principal for free admission.
Authority over (কর্তৃত্ব, আধিপত্য): She has no authority over his growing daughters.
Based on(প্রতিষ্ঠিত, ভিত্তিক): His information is not based on the correct information.
Concentrate on(কেন্দ্রীভূত করা): Try to concentrate your attention on your studies.
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Idioms
Call in question (সন্দেহ করা): No one can call his honesty in question.
Pick one’s pocket (পকেট মারা)— He tried to pick my pocket.
Slip of the tongue (বলায় সামান্য ভুল): This is a slip of the tongue; don’t pay much stress on it.
Take to heart (মর্মাহত হওয়া)- He really took it to heart when I asked him to reconsider.
To meet trouble half-way (পুরোপুরি মোকাবেলার আগেই হাল ছেড়ে দেয়া): He met trouble half way after getting the instructions.