Safety lock : রক্ষাছি্টকিনি;
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Appropriate Prepositions
Absorbed in(মগ্ন): I am absorbed in my study.
Bound for(প্রস্তুত থাকা): Although we can see that it is bound for failure, it is fascinating to follow its journey.
Conform to (নিয়মনীতি অনুসরণ করা): The employees have to conform to a strict dress code.
Count upon(নির্ভর করা): He always counts upon your help for this work.
Worry about (কোনো কিছু বা কাউকে নিয়ে উদ্বিগ্ন হওয়া): Please, don’t worry about me. I will be alright.
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Idioms
Fight shy of (এড়িয়ে যাওয়া): Honest boys always fight shy of bad and dishonest friends.
Gain Ground (সুবিধা পাওয়া): The wise are said to gain the ground in the long run.
Out of temper (ক্রুদ্ধ): The teacher is out temper to see the overall results.
To the brim (কানায় কানায়) - The river was full to the brim.
Upper hand (প্রাধান্য) - He got the upper hand in the selection.