Waif : বেওয়ারিশ মাল, ভবঘুরে, পরিত্যক্ত গৃহহীন শিশু;
Related Words
waif  whiff  wife  See Words Also In
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Appropriate Prepositions
Acquit of (অব্যাহতি দেয়া): The chief justice acquitted him of the charge of murder.
Guess at (অনুমান করা): It is difficult to guess at the age of women.
Quick at (চটপটে): A cashier must be quick at figures.
Rely on (নির্ভর করা): We should not rely on a lazy man.
Send for (ডেকে পাঠানো): Send for a doctor immediately.
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Idioms
At a snail's pace (very slowly – খুব ধীর গতিতে) The economy of Bangladesh is growing at a snail’s pace.
At least (in the lowest estimate- কমপক্ষে) He is the owner of thirty lakh taka at least.
Dead of night (মধ্যরাত্রি): The robbers broke into the house at dead of night.
Fair play (প্রতারণা বিহীন নীতি বা কাজ): I believe in the practice of fair play in my business.
To the letter (in all details, অক্ষরে অক্ষরে) —Follow my advice to the letter.