Triennial : ত্রৈবার্ষিক; ত্রিবর্ষ স্থায়ী;
Related Words
treenail  triennial  trinomial  See Words Also In
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Appropriate Prepositions
Angry with(কারো সাথে ক্রুদ্ধ হওয়া): The teacher was very angry with the students.
Break in (কথার মাঝে কথা বলা): As she was talking, he suddenly broke in, saying, ‘that’s a rat!’
Creep up (বৃদ্ধি পাওয়া): The prices of are creeping up day by day.
Descend on (আক্রমণ করা): Armed thieves descended on the helpless girl.
Substitute for (বদলে দেওয়া): This action is substitute for that.
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Idioms
Black sheep - (কুলাঙ্গার): Stay away from the Black sheep.
Brown study (দিবাস্বপ্ন): The girl is absorbed in a brown study.
Of course (অবশ্যই): Of course, you know what that meant.
Run into debt (ঋণগ্রস্ত হওয়া)— He ran into debt.
Under age (অপ্রাপ্ত বয়স্ক)- He could not cast his vote because he was under age.