Unsubstantiated : অপ্রমাণিত; অপ্রমাণসিদ্ধ;
Related Words
unsubstantial  unsubstantiality  unsubstantiated  See Words Also In
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Appropriate Prepositions
Burdened with (ভারাক্রান্ত): Rahim is burdened with a big family.
Congratulate on(অভিনন্দন জানানো): They congratulated me on my brilliant success.
Look into (তদন্ত করা/অনুসন্ধান করা): I am looking into the matter.
Sentence to, for (দন্ডাদেশ দেওয়া): He was sentenced to death for murder.
Yield to (নতি স্বীকার করা): I shall not yield to his temptation.
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Idioms
Hush money (ঘুষ): He offered a hush money to disclose the file.
Make hay while sun shines (ঝোপ বুঝে কোপ মারা) You should try to make hay while sun shines.
Pros and cons (খুঁটিনাটি): You should consider the pros and cons of the system.
Ups and downs (উত্থান পতন): There are ups and downs in a man’s life.
Weal and woe (joy and sorrow, সুখ দঃখ) —Human life is full of weal and woe.