Substandard : নিকৃষ্ট মানের; স্বাভাবিক মান অপেক্ষা হীনতর;
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Appropriate Prepositions
Acquit of (অব্যাহতি দেয়া): The chief justice acquitted him of the charge of murder.
Consistent with(সামঞ্জস্যপূর্ণ): Your action is not consistent with your word.
Desist from (বিরত থাকা): She desisted from making this.
Devote to (উৎসর্গ করা/নিয়োজিত করা): Students should devote sufficient time to their studies.
Regret for (দুঃখ করা): We regretted for his failure.
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Idioms
At last (in the end – অবশেষে) He tried hard, and at last, succeeded in achieving his goal.
Hold water (ধোপে টেকা): This policy will not hold water in this situation.
Silver tongue (মিষ্টভাষী)- He is a man of silver tongue.
To meet trouble half-way (পুরোপুরি মোকাবেলার আগেই হাল ছেড়ে দেয়া): He met trouble half way after getting the instructions.
Under age (অপ্রাপ্ত বয়স্ক)- He could not cast his vote because he was under age.