Unstable : অস্থিরচিত্ত; চঞ্চল;
Related Words
unestablished  unget-at-able  unjustifiable  unjustifiably  unquotable  unstable  unstatutable  unstoppable  unsuitability  unsuitable  See Words Also In
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Appropriate Prepositions
Based on(প্রতিষ্ঠিত, ভিত্তিক): His information is not based on the correct information.
Defend against (রক্ষা করা): We will defend our country against all enemies.
Desire for (আকাঙ্ক্ষা করা): He has no desire for money.
Search for (সন্ধান করা): The police searched the halls of residence for arms.
Take pity on (দয়া করা): Take pity on the helpless people.
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Idioms
Ins and out (খুঁটিনাটি): I know ins and outs of this file.
In a nutshell (সংক্ষেপে): Tell the whole story in a nutshell.
In the long run (পরিণামে): You will have to suffer in the long run.
See to (বিবেচনা করা)— Can you see to it that everyone gets a copy of this memo?
Well up (সুপন্ডিত)- Dr. Shahidullah was well-up in Bengali language.