Unthankful : অকৃতজ্ঞ;
Related Words
unthankful  unthankfulness  unthinkable  See Words Also In
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Appropriate Prepositions
Contrary to(বিপরীত, পরিপন্থী): Students should not act contrary to the rules of discipline.
Die of, for, from (মারা যাওয়া): He died of cholera. He died for his country. He died from an injury.
Genius for (দক্ষতা): Nazrul had a genius for convincing girls.
Send for (ডেকে পাঠানো): Send for a doctor immediately.
Stick to (দৃঢ়ভাবে লেগে থাকা): We should always stick to our decisions.
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Idioms
Burning question - (গুরুত্বপূর্ন বিষয়): Poverty problem is a burning question of our country.
Give in (বশ্যতা স্বীকার করা): We will never give in to our enemies.
Make head or tail – (মাথামুন্ডু বুঝা) – I cannot make head or tail of what you say.
Swan-song (অন্তিম গীত, শেষ কর্ম): This writing is the swan song of Kazi Nazrul islam.
Widow’s mite (দরিদ্রের ক্ষুদ্র দান): A windows mite is no less important than a large contribution of a rich man.