Proficient : দক্ষ, বু্যৎপন্ন;
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Appropriate Prepositions
Aptitude for(স্বাভাবিক দক্ষতা, যোগ্যতা): He has no aptitude for public service.
Certain of(নিশ্চিত): Jamal is certain of his success.
Enter into (কোনো কিছুতে আবদ্ধ হওয়া): pma entered into a new agreement.
Guard from/against (রক্ষা করা): My parents always guard me from/against bad people.
Sick of (ক্লান্ত): He is sick of this idle life.
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Idioms
Bad book (disfavour-খারাপ নজর —n) The secretary has fallen in the bad book of the manager.
Crocodile tears (মায়াকান্না): He shed crocodile tears at our misery.
In black and white – (লিখিতভাবে) – Put forward your proposal in black and white.
On the contrary (বিপরীত পক্ষে): I do not hate him; on the contrary I love him.
Set something right (ঠিক করা)— He will set the machine right.