Sympathetic ink : অদৃশ্য কালি;
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Appropriate Prepositions
Cast aside (ছুঁড়ে ফেলা): As soon as they become rich they cast aside their poor friends.
Close to(নিকটে): Our College is close to the Post Office.
Inferior to (নীচু/হীন): He is inferior to his neighbor.
Recover from (সুস্থ হওয়া; পূর্ব অবস্থায় ফিরে আসা): The patient has not yet recovered from his severe illness.
Sick of (ক্লান্ত): He is sick of this idle life.
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Idioms
At a discount (অনাদৃত) Female education is no longer at a discount now.
As a whole (মোটের উপর, সম্পূর্ন এক মনে করে-adv.) Look at life as a whole and you will see that it is meaningful.
Give one’s right arm (বিপদের ঝুকি নেয়া): I will give my right arm if I could manage the tickets.
Liable to mislead (প্রতারণাপূর্ণ- deceptive): Appearances can often be liable to mislead.
Turn down (refuse, প্রত্যাখান করা) —He turned down my proposal.