Helpful : সাহায্যকারী, উপকারী
Related Words
helpful  helpfulness  helpless  See Words Also In
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Appropriate Prepositions
Burst out a laughter(হাসিতে ফেটে পড়া) He bursts out a laughter.
Look for (খোঁজা): I was looking for the lost phone.
Remedy for (প্রতিকার): There is no remedy for his misbehavior.
Sad at (দুঃখিত): All his colleagues were very sad at his transfer from this place.
Suffer from (অসুখে ভোগা, কষ্ট পাওয়া): He has been suffering from fever for last three days.
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Idioms
At-fault (guilty-কিংকর্তব্যবিমূঢ়, অপরাধ, দোষ adj.) You are at fault.
Fight shy (এড়িয়ে চলা): Why do you fight shy of your teacher?
Maiden speech (প্রথম বক্তৃতা): His maiden speech fell flat on the audience.
Square meal (পেট ভরা আহার): He is too poor to have a square meal everyday.
Upper hand (প্রাধান্য) - He got the upper hand in the selection.