Potassium : রাসায়নিক ক্ষারজ শ্বেতবর্ণ ধাতুবিশেষ;
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Appropriate Prepositions
Adapt to(খাপ খাওয়ানো): Everybody must adopt himself to new environment.
Ascend to (আরোহণ করা): karim began to ascend to the surface of wakefulness.
Match for (প্রতিদ্বন্দ্বী): He is no match for me.
Subject to (সাপেক্ষে): The man was appointed subject to the approval of the chairman.
Take pity on (দয়া করা): Take pity on the helpless people.
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Idioms
Bad bargain (purchasing at a high price-বেশি দামে কেনা-n) You had a bad bargain of the watch I see.
Pave the way (সুপ্রসন্ন করা) – I am sure I can pave the way for your success.
Read between the lines (understand the significance, অন্তনিহিত অর্থ বুঝা) Try to read between the lines of the letter.
Safe and sound (নিরাপদে)— He reached home safe and sound.
To the point (সঠিক) - The boy answered the question to the point.