Useful : প্রয়োজনীয় ; দরকারী;
Related Words
useable  useful  usefully  usefulness  See Words Also In
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Appropriate Prepositions
Annoyed at(ব্যক্তি ছাড়া অন্যকিছুর প্রতি বিরক্ত): They were annoyed at his rough behavior.
Genius for (দক্ষতা): Nazrul had a genius for convincing girls.
Inferior to (নীচু/হীন): He is inferior to his neighbor.
Repent of (অনুতাপ করা): I repented of my past.
Rule over (শাসন করা): In the absence of the Parliament, the President rules over the country.
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Idioms
At times (মাঝে মাঝে): He at times comes here.
Pick one’s pocket (পকেট মারা)— He tried to pick my pocket.
Safe and sound (নিরাপদে)— He reached home safe and sound.
Silver living (hope- আশা বা ভালো দিক): Every cloud has a silver lining.
Under age (অপ্রাপ্ত বয়স্ক)- He could not cast his vote because he was under age.