Invalid : পঙ্গু,অশক্ত,দুর্বল অক্ষম,
Related Words
in validity  inability  invalid  invalidate  invalidated  invalidating  invalidism  invalidity  involuted  See Words Also In
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Appropriate Prepositions
Aim at(আঘাত করার জন্য লক্ষ্য স্থির করা): The hunter aimed at the tiger.
Call in(ডাকিয়া আনা): They called in a doctor.
Devoid of (বিহীন/বর্জিত): He is devoid of common sense.
Dull at (অপ্টু/কাঁচা): He is dull at mathematics.
Short of (অপর্যাপ্ত): I am running short of money.
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Idioms
All along - (সব সময়): I was present in the meeting all along.
All up with - (পুরোপুরি, হতাশ, সব আশা শেষ): If we can't, it's all up with the councillor.
Fight shy (এড়িয়ে চলা): Why do you fight shy of your teacher?
On the wane (হ্রাসমান): His fame is on the wane now.
Up-to-date (আধুনিক) - Now-a-days ladies are very up to date.