Despairingly : হতাশ হয়ে;
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Appropriate Prepositions
Cause for (চিন্তিত হওয়ার কারণ): He has never given me any cause for concern.
Convinced of (আশ্বস্ত): You are convinced of his product.
Count upon(নির্ভর করা): He always counts upon your help for this work.
Object to (আপত্তি করা): He objected to my proposal.
Regret for (দুঃখ করা): We regretted for his failure.
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Idioms
Get rid of (মুক্তি পাওয়া): Try to get rid of the rogue.
Lion’s share (বড় মাপের অংশ): He took the lion’s share of the profit.
Red tape (official formalities, অফিসের কাজ)— You would not believe the red tape involved in getting the required permits.
Slow coach (অলস): You cannot expect much from a slow coach.
Take to heart (মর্মাহত হওয়া)- He really took it to heart when I asked him to reconsider.