River-basin : অববাহিকা;
Related Words
refurbishing  river basin  river-basin  See Words Also In
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Appropriate Prepositions
Concern with (জড়িত থাকা): Asif is not concerned with this conspiracy.
Make of (কোনো উপকরণ দ্বারা সরাসরি তৈরী বোঝাতে): This necklace is made of gold.
Rejoice at/in (আনন্দ করা): Everybody rejoiced at/in his success.
Succeed in (সাফল্য লাভ করা): He succeeded in life.
Thirst for (তৃষ্ণা, আকাঙ্ক্ষা): A wise man has no thirst for wealth.
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Idioms
At a snail's pace (very slowly – খুব ধীর গতিতে) The economy of Bangladesh is growing at a snail’s pace.
Hard nut to crack (কঠিন সমস্যা): The problem of adult education is really hard nut to crack.
Slip of the pen (লেখায় অসতর্কতাবশত সামান্য ভুল): The mistake is due to a slip of the pen.
To meet trouble half-way (পুরোপুরি মোকাবেলার আগেই হাল ছেড়ে দেয়া): He met trouble half way after getting the instructions.
To the backbone (to the core, হাড়ে হাড়ে) —The boy is wicked to the backbone.