By night : রাতের বেলায়;
Related Words
be naughty  benighted  by night  See Words Also In
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Appropriate Prepositions
Ask about (কাউকে খোঁজ করা): Rahim asked about Karim.
Authority on(বিশেষজ্ঞ পন্ডিত): Kamal was an authority on English literature.
Count upon(নির্ভর করা): He always counts upon your help for this work.
Full of (পরিপূর্ণ): Our Rivers are full of fishes.
Shocked at (মানসিক আঘাতপ্রাপ্ত): Snigdha was terribly shocked at the death of Ratul.
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Idioms
Dead language (যে ভাষা এখন আর কথ্য নয়): Sanskrit is a rich language, but it is now a dead language.
Fair and square (সৎ): The learned persons should be fair and square.
From hand to mouth (দিন আনে দিন খায়): The poor man live from hand to mouth.
Out of date (সেকেলে): This fashion is out of date.
With might and main (যথা শক্তি দিয়ে) —He tried with might and main to help me.