Non-observant : লঙ্ঘনকারী;
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Appropriate Prepositions
Attend on/upon (সেবা করা): We should attend on/upon the ailing patient.
Aware of(অবগত): I am not aware of his dishonesty.
Depend on (নির্ভর করা): Presently, the students depend on/upon guide books.
Grateful to (কৃতজ্ঞ): We should be grateful to our teachers.
Hard of (কানে খাটো বা কম শোনা): Ratan is a hard of hearing.
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Idioms
At one’s elbow (near at hand — হাতের কাছে – adv.) His private secretary is always at his elbow.
Eat humble pie (অপমান হজম করে ক্ষমা চাওয়া): The manager had to eat humble pie before his employees.
Hush money (ঘুষ): He offered a hush money to disclose the file.
Ups and downs (উত্থান পতন): There are ups and downs in a man’s life.
With a view to (উদ্দেশ্য)- He goes to college with a view to attending the class.