Unsubstantiated : অপ্রমাণিত; অপ্রমাণসিদ্ধ;
Related Words
unsubstantial  unsubstantiality  unsubstantiated  See Words Also In
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Appropriate Prepositions
Bar to(বাধা): Poverty is not a bar to happiness.
Full of (পরিপূর্ণ): Our Rivers are full of fishes.
Regard for (সম্মান): Good boys have great regard for their teachers.
Satisfied with (সন্তুষ্ট): The authoress was highly satisfied with Jerry.
Take after (সদৃশ হওয়া, একই রকম হওয়া): The boy takes after his brother.
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Idioms
After all - (সব কথার পরেও): I rang and told her I couldn't come after all.
At liberty (free-মুক্ত-adj.) They are at liberty to go anywhere.
Fight shy (এড়িয়ে চলা): Why do you fight shy of your teacher?
Get rid of (মুক্তি পাওয়া): Try to get rid of the rogue.
Irony of fate (ভাগ্যের পরিহাস): He could not succeed by irony of fate.