Underpin : জোরালো করা; সত্যতা প্রতিপন্ন করা; সমর্থন করা; দেওয়াল ইত্যাদিতে ঠেকনো লাগানো;
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Appropriate Prepositions
At lunch (দুপুরের খাবারে): They were talking so much at lunch that their food went cold.
Quick at (চটপটে): A cashier must be quick at figures.
Refrain from (বিরত রাখা বা থাকা): I refrained him from smoking.
Repentance for (অনুতাপ): He has repentance for the past.
Rule over (শাসন করা): In the absence of the Parliament, the President rules over the country.
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Idioms
After all - (সব কথার পরেও): I rang and told her I couldn't come after all.
All at once - (হঠাৎ): I feel terribly sleepy all at once.
Man of letters (পন্ডিত ব্যক্তি): You are truly a man of letters.
On the whole (মোটের ওপর): On the whole, his conduct is good.
Under age (অপ্রাপ্ত বয়স্ক)- He could not cast his vote because he was under age.