Spontaneously : স্বত:স্ফূর্তভাবে; স্বাভাবিকভাবে;
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Appropriate Prepositions
Apologize to (ক্ষমা প্রার্থনা করা, দুঃখসহ ত্রুটি স্বীকার করা): The student apologized to the Principal for adopting unfair means in the examination.
Bar to(বাধা): Poverty is not a bar to happiness.
Faith in (বিশ্বাস): I have no faith in him.
Shout at (চিৎকার করে ডাকা): Do not shout at your parents.
Taste for (রুচি; পছন্দ): He has a great taste for music.
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Idioms
In no time (শীঘ্র): He will finish the work in no time.
Out of date (সেকেলে): This fashion is out of date.
To the point (সঠিক) - The boy answered the question to the point.
To and fro (hither and thither, এদিক ওদিক)-The man is walking to and fro.
Well up (সুপন্ডিত)- Dr. Shahidullah was well-up in Bengali language.