In principle : মূল নীতি বা নিয়ম দিক দিয়া;
Related Words
in principle  infrangible  inprinciple  See Words Also In
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Appropriate Prepositions
Answerable to (কারো কাছে জবাবদিহিতা করা): He is not answerable to anybody for his mistake.
Appoint to(নিযুক্ত করা/হওয়া): Kibria has been appointed to the post of Headmaster.
Busy with(ব্যস্ত থাকা): Rahim is now busy with her homework.
Consist in (কোনো কিছু মধ্য বিদ্যমান থাকা): Happiness consists in contentment.
Look up (ডিকশনারি থেকে শব্দার্থ খোঁজা): He is looking up a new word meaning from dictionary.
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Idioms
At one’s elbow (near at hand — হাতের কাছে – adv.) His private secretary is always at his elbow.
Eat humble pie (অপমান হজম করে ক্ষমা চাওয়া): The manager had to eat humble pie before his employees.
In vogue (চালু): This custom is not in vogue at present.
Pack of lies (ডাঁহা মিথ্যা)—He told pack of lies to prove himself innocent.
To and fro (hither and thither, এদিক ওদিক)-The man is walking to and fro.