Potassium : রাসায়নিক ক্ষারজ শ্বেতবর্ণ ধাতুবিশেষ;
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Appropriate Prepositions
Abide by(মেনে চলা): We must abide by the rules of discipline.
Capable of(সক্ষম): He is capable of doing it.
Render into (অনুবাদ করা): Render the passage into Bengap.
Sad at (দুঃখিত): All his colleagues were very sad at his transfer from this place.
Welcome to (স্বাগত জানানো): You are welcome to our new office.
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Idioms
As a whole (মোটের উপর, সম্পূর্ন এক মনে করে-adv.) Look at life as a whole and you will see that it is meaningful.
Bad blood - (শত্রুতা): There has always been bad blood between these families.
Soft Soap (নিজ অভিপ্রায়ে/অভিসন্ধিতে তোষামোদ করা): He was expert in soft soap.
To and fro (hither and thither, এদিক ওদিক)-The man is walking to and fro.
With the sweat of one’s brow (মাথার ঘাম পায়ে ফেলে) — He earns his livelihood with the sweat of his brow.