Wavefront : যে তল বা পৃষ্ঠের অনেকগুলি বিন্দু একট নির্দিষ্ট সময়ে একটি তরঙ্গের দ্বারা সমানভাবে প্রভাবিত হয়;
Related Words
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Appropriate Prepositions
Admit to(ভর্তি করা): The boy was admitted to class Nine.
Comply with(মেনে নেওয়া): The clerks must comply with the orders of their officer.
Conceal from(লুকানো) Do not conceal anything from me.
Contemporary of (সমসাময়িক): William Wordsworth was a contemporary for greater efficiency.
Shout at (চিৎকার করে ডাকা): Do not shout at your parents.
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Idioms
Back and forth (to and fro-এদিক ওদিক – adv.) The mad man was walking back and forth in the doctor’s chamber.
Give one’s right arm (বিপদের ঝুকি নেয়া): I will give my right arm if I could manage the tickets.
Out of temper (ক্রুদ্ধ): The teacher is out temper to see the overall results.
Red tape (official formalities, অফিসের কাজ)— You would not believe the red tape involved in getting the required permits.
Riding for a fall (বেপরোয়াভাবে কাজ করা- to act recklessly): He rides for a fall in the election.