Sine qua non : অপরিহার্য শর্ত;
Related Words
sine qua non  sine quanon  sinequanon  See Words Also In
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Appropriate Prepositions
Annoyed at(ব্যক্তি ছাড়া অন্যকিছুর প্রতি বিরক্ত): They were annoyed at his rough behavior.
Averse to (বিমুখ): Rahim was averse of your various problems.
Careful of(যত্নশীল থাকা): Sadia is careful of her health.
Concerned with(জড়িত): She was concerned with such things.
Object to (আপত্তি করা): He objected to my proposal.
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Idioms
At a discount (অনাদৃত) Female education is no longer at a discount now.
Back and forth (to and fro-এদিক ওদিক – adv.) The mad man was walking back and forth in the doctor’s chamber.
Do yeoman’s service (বিশেষ উপকার করা): Freedom fighters have done yeoman’s service for country.
Gift of the gab (বাকপটুতা): An advocate should have the gift of the gab.
Nip in the bud (অঙ্কুরে বিনষ্ট হওয়া): All his hopes were nipped in the bud.