Penetrating : তীক্ষ্ন, তীক্ষ্ণবুদ্ধি;
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Appropriate Prepositions
Consolidate for (শক্তিশালী করা): The four new companies consolidated for greater efficiency.
Fail in (ব্যর্থ হওয়া): He failed in getting internet connection in his room.
Informed of (অবহিত): I was not informed of your misfortune.
Sick of (ক্লান্ত): He is sick of this idle life.
Sorry for (দুঃখিত): He is sorry for his misdeeds.
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Idioms
Birds of a feather (persons of like disposition-একই পর্যায়ের লোক) Bird’s of a feather flock together.
Back and forth (এদিক ওদিক) The mad man was running back and forth in the hospital.
To play on a fiddle (অনর্থক সময় নষ্ট করা - To waste time)-He played on a fiddle by nature.
Short temper (রগচটা)— He is a man of short temper.
Tooth and nail (তীব্রভাবে): He fought tooth and nail for the sake of country.