Arch-enemy : শত্রুপ্রবর; বৈরীপ্রধান; ঘোর শত্রু;
Related Words
arcane  arch enemy  arch-enemy  archaean  archangel  archenemy  See Words Also In
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Appropriate Prepositions
By heart (মুখস্থ): Kamal learnt to poem by heart.
Careful of(যত্নশীল থাকা): Sadia is careful of her health.
Fail in (ব্যর্থ হওয়া): He failed in getting internet connection in his room.
Relation with (সম্পর্ক): I have no relation with the culprit.
Urge upon (আহবান জানানো): She urged upon his son the importance of being honest.
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Idioms
Crying need (জরুরী): Mass education is a crying need for India.
Fish in a troubled water (এলোমেলো অবস্থার সুযোগ নেয়া): He made a lot of money by fishing in a troubled water.
Gain Ground (সুবিধা পাওয়া): The wise are said to gain the ground in the long run.
Null and void (বাতিল): The deed has been null and void now.
On the wane (হ্রাসমান): His fame is on the wane now.