Harmless : নির্দোষ, নিরীহ, অক্ষত
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Appropriate Prepositions
Affection for(স্নেহ): She has a great affection for the child.
Annoyed for(কোনো কারনে বিরক্ত হওয়া): The officer was annoyed with the clerk for being late.
Complain to (কারো কাছে নালিশ করা): You should not complain to his parents.
Look at (তাকানো): Students look at the blackboard.
Regret for (দুঃখ করা): We regretted for his failure.
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Idioms
At random (indiscriminately—এলোপাথাড়ি-adv.) He talks at random like a mad man.
In black and white – (লিখিতভাবে) – Put forward your proposal in black and white.
Make hay while sun shines (ঝোপ বুঝে কোপ মারা) You should try to make hay while sun shines.
Read between the lines (understand the significance, অন্তনিহিত অর্থ বুঝা) Try to read between the lines of the letter.
Seventh heaven – (মহাখুশী) – I was in the seventh heaven when I heard the news of my BCS final result.