Trigonometry : ত্রিকোণমিতি;
Related Words
trigonometric  trigonometry  See Words Also In
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Appropriate Prepositions
Caution against(সাবধান): Take all cautions against the danger.
Count for(গণ্য বা বিবেচিত হওয়া): There can be no lasting peace without true democracy in which the people play a part and count for something.
Fatigued by (ক্লান্ত): He was fatigued by hard work.
Free from (মুক্ত): He is now free from danger.
Regret for (দুঃখ করা): We regretted for his failure.
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Idioms
As a rule (নিয়ম অনুসারে.) As a rule, she kept silent in the meeting.
Birds of a feather (persons of like disposition-একই পর্যায়ের লোক) Bird’s of a feather flock together.
In lieu of (পরিবর্তে): Give me this pen in lieu of that.
In no time (শীঘ্র): He will finish the work in no time.
Laughing stock (হাসির পাত্র)— He is a laughing stock to all.