Radioactivity : তেজস্ক্রিয়তা;
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Appropriate Prepositions
Abhorrent to(ঘৃণ্য): Racism of any kind is abhorrent to me.
Business with (ব্যবসা, কাজ): He is pleased to do business with you.
Comply with(মেনে নেওয়া): The clerks must comply with the orders of their officer.
Entrust with (কোনো কিছু দ্বারা কাউকে বিশ্বাস করে): He entrusted me with the thing.
Shout at (চিৎকার করে ডাকা): Do not shout at your parents.
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Idioms
Bear hard upon (behave rudely-নির্দয়ভাবে ব্যবহার করা - V) Never bear hard upon your servants.
Carry the day (জয়লাভ করা) The boys carried the day in the debate competition.
Maiden speech (প্রথম বক্তৃতা): His maiden speech fell flat on the audience.
Put up with (সহ্য করা - tolerate): I could not put up with his behavior.
With a lavish hand (মুক্ত হস্তে)— Give away something with a lavish hand.