Invalidity : দুর্বলতা; অকার্যকরতা;
Related Words
immovability  in validity  inability  invalid  invalidate  invalidated  invalidating  invalidism  invalidity  See Words Also In
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Appropriate Prepositions
Affection for(স্নেহ): She has a great affection for the child.
Akin to(সমজাতীয়): These are akin to one another.
Concentrate on(কেন্দ্রীভূত করা): Try to concentrate your attention on your studies.
Covetous of(লোভী হওয়া): He is covetous of wealth.
Faithful to (বিশ্বস্ত): The dog is very faithful to its master.
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Idioms
Bear in mind (remember— মনে রাখা —V): You should also bear in mind the additional costs of the mortgage.
Fight shy (এড়িয়ে চলা): Why do you fight shy of your teacher?
Make head or tail – (মাথামুন্ডু বুঝা) – I cannot make head or tail of what you say.
Now and then (মাঝে মাঝে): He comes here now and then.
Out of order (বিকল): The elevator was out of order.