First hand knowledge : মৌল জ্ঞন;
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Appropriate Prepositions
Antipathy to/towards (ঘৃনা): I have a strong antipathy to smoking.
Conceal from(লুকানো) Do not conceal anything from me.
Devoid of (বিহীন/বর্জিত): He is devoid of common sense.
Relevant to (প্রাসঙ্গিক): Your answer is not exactly relevant to my question.
Sorry for (দুঃখিত): He is sorry for his misdeeds.
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Idioms
At death’s door (at the point of death- মৃত্যুর দ্বারে) The patient is now at death’s door.
At the top of (শীর্ষে): The boy shouted at the top of his voice.
Bad book (disfavour-খারাপ নজর —n) The secretary has fallen in the bad book of the manager.
Run a risk (ঝুকি নেয়া) — He ran a risk to save his life.
To the contrary (against what some one had said, পক্ষান্তরে) —He said nothing to the contrary.