Proficiency : পারদর্শিতা, দক্ষতা, উন্নতি;
Related Words
profi ciency  proficiencies  proficiency  See Words Also In
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Appropriate Prepositions
Alarm at, by, for(আশংকা করা/শঙ্কিত হওয়া): I was not alarmed at/by the news, but I was alarmed for their safety.
By heart (মুখস্থ): Kamal learnt to poem by heart.
Regard for (সম্মান): Good boys have great regard for their teachers.
Stick to (দৃঢ়ভাবে লেগে থাকা): We should always stick to our decisions.
Taste of (স্বাদ; অভিজ্ঞতা): They have had some taste of problems.
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Idioms
At all (in the least degree – মোটেও না) There is no water at all in the pond.
Back and forth (এদিক ওদিক) The mad man was running back and forth in the hospital.
Fair play (প্রতারণা বিহীন নীতি বা কাজ): I believe in the practice of fair play in my business.
Follow the footsteps of (পায়ে পায়ে অনুসরণ করা): People always follow the footsteps of some great man.
In black and white – (লিখিতভাবে) – Put forward your proposal in black and white.