Impregnability : অগম্যতা;
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impregnability  impressionability  See Words Also In
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Appropriate Prepositions
Argue against (বিপক্ষে বলা): She argued against the bill.
Informed of (অবহিত): I was not informed of your misfortune.
Regret for (দুঃখ করা): We regretted for his failure.
Succeed in (সাফল্য লাভ করা): He succeeded in life.
Take after (সদৃশ হওয়া, একই রকম হওয়া): The boy takes after his brother.
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Idioms
At home (comfortable— আরাম) He feels at home in Dhaka now.
Back and forth (to and fro-এদিক ওদিক – adv.) The mad man was walking back and forth in the doctor’s chamber.
Lump sum (এক কালীন) — He gave us lump sum money.
Silver tongue (মিষ্টভাষী)- He is a man of silver tongue.
With the sweat of one’s brow (মাথার ঘাম পায়ে ফেলে) — He earns his livelihood with the sweat of his brow.