Hard and fast : বাঁধা-ধরা; অপরিবর্তনীয়ভাবে বিধিবদ্ধ; বাঁধাধরা;
Related Words
hard and fast  hard and fast rules  See Words Also In
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Appropriate Prepositions
Adept in (দক্ষ): He is adept in playing football.
Apply to (কারো কাছে আবেদন করা): He applied to the principal for free admission.
Change into (পরিবর্তিত হওয়া): At what point does boiling water change into vapor.
Deaf to, of, in (না শোনা, বধির হওয়া): The boy is deaf to his father’s advice. This man is deaf of/in one ear.
Faithful to (বিশ্বস্ত): The dog is very faithful to its master.
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Idioms
At all (in the least degree – মোটেও না) There is no water at all in the pond.
Backstairs influence (secret and illegal influence- গোপন এবং বে আইনী প্রভাব-n) He did not deseve the job, however, he got it by backstairs influence.
Fair play (প্রতারণা বিহীন নীতি বা কাজ): I believe in the practice of fair play in my business.
Red tape (official formalities, অফিসের কাজ)— You would not believe the red tape involved in getting the required permits.
To the letter (in all details, অক্ষরে অক্ষরে) —Follow my advice to the letter.