Pertinacious : স্থির, প্রতিজ্ঞ, জেদী, একগুয়ে;
Related Words
partitions  pertaining  pertaining to  pertains  pertinacious  pertinacity  pertinence  pertinency  pretensions  See Words Also In
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Appropriate Prepositions
Assure of(আশ্বাস দেওয়া): I can assure you of the Principal’s honesty.
By heart (মুখস্থ): Kamal learnt to poem by heart.
Competent for(যোগ্য): He is not competent for the post.
Composed of(তৈরী): This medicine is composed of vitamins and minerals.
Hinge on/upon (নির্ভর করা): The whole matter hinges upon this clue.
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Idioms
As ill-luck would have it (unfortunately- দুর্ভাগ্যবশত) A child was born to them but, as ill-luck would have it, it died when it was eight days old.
Pandora’s box (আপাতঃ দৃষ্টিতে ভালো মনে হলেও আসলে ভালো নয়)—His words proved to be Pandora’s box.
Slow coach (অলস): You cannot expect much from a slow coach.
Stone’s throw (অতি নিকটে): Our school is at a stone’s throw from our house.
Turn down (refuse, প্রত্যাখান করা) —He turned down my proposal.