পরম ঘনত্ব: Absolute density.
Related Words
পরম ঘনত্ব  পরম শূন্য  পরমানন্দ  See Words Also In
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Appropriate Prepositions
Based on(প্রতিষ্ঠিত, ভিত্তিক): His information is not based on the correct information.
Dull of (বধির; কানে শুনে না): He is dull of hearing.
Guilty of (অপরাধী/দোষী): The convict was guilty of murder.
Run into (জড়িয়ে পড়া): He had run into debt.
Similar to (সদৃশ): My T-shirt is similar to yours.
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Idioms
At one’s elbow (near at hand — হাতের কাছে – adv.) His private secretary is always at his elbow.
Bear in mind (মনে রাখা): Always bear in mind that you are a daughter of a reputed person.
Pick a quarrel (ঝগড়া করা)—Do not pick a quarrel.
Square meal (পেট ভরা আহার): He is too poor to have a square meal everyday.
Well up (সুপন্ডিত)- Dr. Shahidullah was well-up in Bengali language.