In validity : দুর্বলতা; অকার্যকরতা;
Related Words
immovability in validity inability invalid invalidate invalidated invalidating invalidism invaliditySee Words Also In
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Appropriate Prepositions
Appeal to, for(কোন ব্যক্তির কাছে কোন কিছুর জন্য আবেদন করা): The flood affected people appealed to the President for reef.
Arrange for(ব্যবস্থা করা): We have arranged everything for our study tour.
Ask about (কাউকে খোঁজ করা): Rahim asked about Karim.
Catch at(ধরা): A drowning man catches at a straw.
Regret for (দুঃখ করা): We regretted for his failure.
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Idioms
Fish in a troubled water (এলোমেলো অবস্থার সুযোগ নেয়া): He made a lot of money by fishing in a troubled water.
Now and then (মাঝে মাঝে): He comes here now and then.
Seventh heaven – (মহাখুশী) – I was in the seventh heaven when I heard the news of my BCS final result.
To the backbone (to the core, হাড়ে হাড়ে) —The boy is wicked to the backbone.
Well off (স্বচ্ছল) - Jim and Della were not well off.