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
Adapt to(খাপ খাওয়ানো): Everybody must adopt himself to new environment.
Afraid of(ভীত): An honest man is not afraid of telling the truth.
Apply to (কারো কাছে আবেদন করা): He applied to the principal for free admission.
At lunch (দুপুরের খাবারে): They were talking so much at lunch that their food went cold.
Indulge in (প্রশ্রয় দেওয়া): You should not indulge in idleness.
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Idioms
All at once - (হঠাৎ): I feel terribly sleepy all at once.
Cut to the quick (মর্মাহত হওয়া): I was cut to the quick by his birds.
Milk and honey – (প্রাচুর্য)- He lives with milk and honey.
Speed money (ঘুষ; উৎকোচ): He hankers after speed money.
Turn over a new leaf (begin a new phase of life, নবজীবন শুরু করা) —After his failure he turned over a new leaf.