Indubitably : নিঃসন্দেহে; সংশয়াতীতরূপে;
Related Words
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Appropriate Prepositions
Angry for (কোন কাজে রাগান্বিত হওয়া): Rahim was angry with me for my having done this.
Certain of(নিশ্চিত): Jamal is certain of his success.
Feed with (কোনো কিছু খাওয়া): They feed the cow with grass.
Long for (আশা করা/কামনা করা): He longed for name and fame.
Refer to (সিদ্ধান্তের জন্য প্রেরণ করা): The matter was referred to the Chairman for a decision.
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Idioms
At home (proficient in — দক্ষ) The students of Bangladesh should be at home in Bangla.
At-fault (guilty-কিংকর্তব্যবিমূঢ়, অপরাধ, দোষ adj.) You are at fault.
Crying need (জরুরী): Mass education is a crying need for India.
In a nutshell (সংক্ষেপে): Tell the whole story in a nutshell.
Three R's (প্রাথমিক শিক্ষা)— He has not yet learnt the three R's.