Unassailably : প্রশ্নাতীত; সন্দেহাতীত;
Related Words
unassailable  unassailably  unsalable  unsaleable  unscalable  unsolvable  See Words Also In
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Appropriate Prepositions
Answer for(কোনো কারনে জবাবদিহি করা): He will have to answer for his misdeeds.
Charge with(অভিযুক্ত করা): He is charged with killing.
Guilty of (অপরাধী/দোষী): The convict was guilty of murder.
Sad at (দুঃখিত): All his colleagues were very sad at his transfer from this place.
Similar to (সদৃশ): My T-shirt is similar to yours.
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Idioms
Hold water (ধোপে টেকা): This policy will not hold water in this situation.
In full swing (পুরোদমে): The school is in full swing after the vacation.
Of course (অবশ্যই): Of course, you know what that meant.
Out of temper (ক্রুদ্ধ): The teacher is out temper to see the overall results.
Silver living (hope- আশা বা ভালো দিক): Every cloud has a silver lining.