Lone wolf : একা একা থাকতে পছন্দ করে এমন প্রাণী;
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Appropriate Prepositions
Alarm at, by, for(আশংকা করা/শঙ্কিত হওয়া): I was not alarmed at/by the news, but I was alarmed for their safety.
Apologize to (ক্ষমা প্রার্থনা করা, দুঃখসহ ত্রুটি স্বীকার করা): The student apologized to the Principal for adopting unfair means in the examination.
Argue with, about(কথা কাটাকাটি করা): They always argue with me about tiny matter.
Feed with (কোনো কিছু খাওয়া): They feed the cow with grass.
Relevant to (প্রাসঙ্গিক): Your answer is not exactly relevant to my question.
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Idioms
Beggar description - (অবর্ণনীয় হওয়া): The distress of the Muslims in Bosnia beggars description.
Back and forth (to and fro-এদিক ওদিক – adv.) The mad man was walking back and forth in the doctor’s chamber.
Call in question (সন্দেহ করা): No one can call his honesty in question.
Slip of the pen (লেখায় অসতর্কতাবশত সামান্য ভুল): The mistake is due to a slip of the pen.
Weal and woe (joy and sorrow, সুখ দঃখ) —Human life is full of weal and woe.