Sine qua non : অপরিহার্য শর্ত;
Related Words
sine qua non  sine quanon  sinequanon  See Words Also In
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Appropriate Prepositions
Adequate for(পর্যাপ্ত): The loan given by the bank is not adequate for the farming project.
Adequate to(সমানুপাতিক): The salary, he gets, is not adequate to the volume of work he has to do.
Astonished at(বিস্ময়-বিহবল হওয়া): We were astonished at his unexpected success.
Deprived of (বঞ্চিত): He was deprived of education due to extreme poverty.
Run into (জড়িয়ে পড়া): He had run into debt.
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Idioms
At home (proficient in — দক্ষ) The students of Bangladesh should be at home in Bangla.
In one’s teens (তের থেকে উনিশ বছর বয়সের মাঝে): She is yet in her teens.
Pandora’s box (আপাতঃ দৃষ্টিতে ভালো মনে হলেও আসলে ভালো নয়)—His words proved to be Pandora’s box.
To the backbone (to the core, হাড়ে হাড়ে) —The boy is wicked to the backbone.
Weal and woe (সুখ-দুঃখ): Human life is full of weal and woe.