Demarcation : সীমারেখা, সীমা নিদের্শ
Related Words
demarcating  demarcation  demarcations  See Words Also In
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Appropriate Prepositions
Concern with (জড়িত থাকা): Asif is not concerned with this conspiracy.
Enter into (আলোচনা করতে আরম্ভ করা): Let’s not enter into details at this stage.
Hit upon (পরিকল্পনা নেয়া): Rahim hit upon a new plan.
Identical with (একই ধরণের): You are identical with your sister.
Relevant to (প্রাসঙ্গিক): Your answer is not exactly relevant to my question.
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Idioms
Bear in mind (remember— মনে রাখা —V): You should also bear in mind the additional costs of the mortgage.
Lame excuse (বাজে ওজর): The lame excuse will not do.
Lump sum (এক কালীন) — He gave us lump sum money.
Ups and downs (উত্থান পতন): There are ups and downs in a man’s life.
With a lavish hand (মুক্ত হস্তে)— Give away something with a lavish hand.