Unaware : জ্ঞাত নয় এমন, অজ্ঞাত;
Related Words
unaware  unwary  See Words Also In
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Appropriate Prepositions
Burdened with (ভারাক্রান্ত): Rahim is burdened with a big family.
Convince of(বিশ্বাস হওয়া): I am convinced of your efficiency.
Die by (দূর্ঘটনা বা অপঘাতে মরা/কোন কিছু দ্বারা মারা যাওয়া): He died by a road accident.
Relevant to (প্রাসঙ্গিক): Your answer is not exactly relevant to my question.
Work with (কারো সাথে কাজ করা): They will be working with me on the new project.
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Idioms
Fish in a troubled water (এলোমেলো অবস্থার সুযোগ নেয়া): He made a lot of money by fishing in a troubled water.
Foul play (অসদাচারণ করা): We feared that he had met with foul play.
Steer clear of (avoid, দূরে থাকা)— You must steer clear of evil company.
Sheet anchor (শেষ আশ্রয়; প্রধান অবলম্বন; আসল খুঁটি)— This small piece of land is his sheet anchor.
With a lavish hand (মুক্ত হস্তে)— Give away something with a lavish hand.