Pentavalent : পঞ্চ-যোজ্যতাযুক্ত;
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Appropriate Prepositions
Agree with, on, to(একমত হওয়া): My father agreed with me on this point, but he did not agree to my proposal to set up a canteen.
Annoyed with(ব্যক্তির সাথে বিরক্ত হওয়া): I am annoyed with him.
Apply to (কারো কাছে আবেদন করা): He applied to the principal for free admission.
Deprived of (বঞ্চিত): He was deprived of education due to extreme poverty.
Qualified for (যোগ্য প্রতিপন্ন হওয়া): No candidate was properly qualified for the post.
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Idioms
Acid test (অগ্নি পরীক্ষা): You must succeed in the acid test of the time you live in.45
Foul play (অসদাচারণ করা): We feared that he had met with foul play.
Seventh heaven – (মহাখুশী) – I was in the seventh heaven when I heard the news of my BCS final result.
Silver living (hope- আশা বা ভালো দিক): Every cloud has a silver lining.
Tooth and nail (strongly, প্রবলভাবে)-He fought tooth and nail against his enemy.