Astronomical : জ্যোতির্বিদ্যা সংক্রান্ত;
Related Words
astronomical  astronomical year  See Words Also In
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Appropriate Prepositions
Answer for(কোনো কারনে জবাবদিহি করা): He will have to answer for his misdeeds.
Devoid of (বিহীন/বর্জিত): He is devoid of common sense.
Rebel against (বিদ্রোহ করা): The soldiers rebelled against the king.
Relevant to (প্রাসঙ্গিক): Your answer is not exactly relevant to my question.
Subject to (সাপেক্ষে): The man was appointed subject to the approval of the chairman.
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Idioms
Back and forth (to and fro-এদিক ওদিক – adv.) The mad man was walking back and forth in the doctor’s chamber.
Dead language (যে ভাষা এখন আর কথ্য নয়): Sanskrit is a rich language, but it is now a dead language.
Foul play (অসদাচারণ করা): We feared that he had met with foul play.
To the backbone (to the core, হাড়ে হাড়ে) —The boy is wicked to the backbone.
With the sweat of one’s brow (মাথার ঘাম পায়ে ফেলে) — He earns his livelihood with the sweat of his brow.