Black-hearted : ক্রুরহৃদয়; ক্রূরমতি; ক্রূর;
Related Words
black-hearted  blackguard  See Words Also In
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Appropriate Prepositions
Charge with(অভিযুক্ত করা): He is charged with killing.
Contemporary of (সমসাময়িক): William Wordsworth was a contemporary for greater efficiency.
Guard from/against (রক্ষা করা): My parents always guard me from/against bad people.
Pleased with (সন্তুষ্ট): Shamim is pleased with all his employees.
Work for (কারো জন্য কাজ করা): She works for a construction company.
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Idioms
At home (proficient in — দক্ষ) The students of Bangladesh should be at home in Bangla.
At liberty (free-মুক্ত-adj.) They are at liberty to go anywhere.
Pave the way (সুপ্রসন্ন করা) – I am sure I can pave the way for your success.
Run into debt (ঋণগ্রস্ত হওয়া)— He ran into debt.
Stone’s throw (অতি নিকটে): Our school is at a stone’s throw from our house.