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
Cause of(কারণ): Industry is the cause of your success.
Die of (রোগে মরা): Many people died of cholera.
Grateful to (কৃতজ্ঞ): We should be grateful to our teachers.
Rely on (নির্ভর করা): We should not rely on a lazy man.
Take after (সদৃশ হওয়া, একই রকম হওয়া): The boy takes after his brother.
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Idioms
After all - (সব কথার পরেও): I rang and told her I couldn't come after all.
At ease (in peace or pleasure – শান্তিতে বা আরামে) A man who has enemies can not live at ease.
Maiden speech (প্রথম বক্তৃতা): His maiden speech fell flat on the audience.
See to (বিবেচনা করা)— Can you see to it that everyone gets a copy of this memo?
Show good manner (ভালো আচরণ প্রদর্শন ): You should show good manner in the company of young ladies.