Unavailing : নিরর্থক, নিষ্ফল;
Related Words
unavailing  unfailing  unfailingly  unfeeling  unveiling  See Words Also In
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Appropriate Prepositions
Agree with, on, to(একমত হওয়া): My father agreed with me on this point, but he did not agree to my proposal to set up a canteen.
Argue over (কোন বিষয়ে তর্ক করা): The kids are arguing over which TV program to watch.
Assent to(সম্মতি দেওয়া): The President has assented to the bill.
Genius for (দক্ষতা): Nazrul had a genius for convincing girls.
Succeed in (সাফল্য লাভ করা): He succeeded in life.
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Idioms
After all - (সব কথার পরেও): I rang and told her I couldn't come after all.
At home (proficient in — দক্ষ) The students of Bangladesh should be at home in Bangla.
As a rule (নিয়ম অনুসারে.) As a rule, she kept silent in the meeting.
Red tape (official formalities, অফিসের কাজ)— You would not believe the red tape involved in getting the required permits.
Square meal (পেট ভরা আহার): He is too poor to have a square meal everyday.