Firstborn : প্রথম সন্তান; সর্বাগ্রজ;
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Appropriate Prepositions
Competent for(যোগ্য): He is not competent for the post.
Conceal from(লুকানো) Do not conceal anything from me.
Contribution to (অবদান): His invention made a major contribution to road safety.
Inferior to (নীচু/হীন): He is inferior to his neighbor.
Stick to (দৃঢ়ভাবে লেগে থাকা): We should always stick to our decisions.
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Idioms
Make head or tail – (মাথামুন্ডু বুঝা) – I cannot make head or tail of what you say.
Pandora’s box (আপাতঃ দৃষ্টিতে ভালো মনে হলেও আসলে ভালো নয়)—His words proved to be Pandora’s box.
Slip of the pen (লেখায় অসতর্কতাবশত সামান্য ভুল): The mistake is due to a slip of the pen.
Silver living (hope- আশা বা ভালো দিক): Every cloud has a silver lining.
To the point (সঠিক) - The boy answered the question to the point.