Keenness : প্রখরতা; প্রখরত্ব; প্রখরা; আগ্রহ; তীক্ষ্ণতা; উৎসাহ; তীব্রতা;
Related Words
keenness  knees  See Words Also In
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Appropriate Prepositions
Akin to(সমজাতীয়): These are akin to one another.
Alarm at, by, for(আশংকা করা/শঙ্কিত হওয়া): I was not alarmed at/by the news, but I was alarmed for their safety.
Congratulate on(অভিনন্দন জানানো): They congratulated me on my brilliant success.
Hit upon (পরিকল্পনা নেয়া): Rahim hit upon a new plan.
Infested with (অতিষ্ঠ): The room is infested with rats.
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Idioms
ABC - (প্রাথমিক জ্ঞান): I don't know the ABC of politics.
Kith and kin (নিকট আত্মীয়): He has no relation with his kith and kin.
Pass away (মারা যাওয়া)— He passed away last night.
Worthy of (যোগ্য) - He is worthy of a good job.
With the sweat of one’s brow (মাথার ঘাম পায়ে ফেলে) — He earns his livelihood with the sweat of his brow.