Arch enemy : প্রধান শত্রু; শয়তান;
Related Words
arcane  arch angel  arch enemy  arch-enemy  archaean  archangel  archenemy  See Words Also In
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Appropriate Prepositions
Afraid of(ভীত): An honest man is not afraid of telling the truth.
Apathy towards (অনাগ্রহ): The student has great apathy towards his studies.
Bridge over (সেতু): The only entrance to Allahabad in that direction was by a bridge over the Jumna.
Congratulate on(অভিনন্দন জানানো): They congratulated me on my brilliant success.
Monument to (স্মৃতিসৌধ): The monument to your right is a popular tourist attraction.
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Idioms
At least (in the lowest estimate- কমপক্ষে) He is the owner of thirty lakh taka at least.
At random (indiscriminately—এলোপাথাড়ি-adv.) He talks at random like a mad man.
In a fix (মুশকিলে পতিত হওয়া): The man is in a fix with his new hairstyle.
On the whole (মোটের ওপর): On the whole, his conduct is good.
Run a risk (ঝুকি নেয়া) — He ran a risk to save his life.