Perpendicular : লম্ব ঠিক, খাড়া, লম্বভাবে অবস্থিত;
Related Words
perpendicular  perpendicularity  perpendicularly  perpendiculars  See Words Also In
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Appropriate Prepositions
Adept in (দক্ষ): He is adept in playing football.
Consist of(গঠিত হওয়া): The committee consists of ten members.
Feed on (খেয়ে বাঁচা): The cow feeds on grass.
Regret for (দুঃখ করা): We regretted for his failure.
Relevant to (প্রাসঙ্গিক): Your answer is not exactly relevant to my question.
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Idioms
At dead of night (গভীর রাতে) The police caught the thief at dead of night.
Cock and bull story (আষাঢ়ে গল্প): You must be ashamed of your cock and bull story.
Kith and kin (নিকট আত্মীয়): He has no relation with his kith and kin.
Turn over a new leaf (begin a new phase of life, নবজীবন শুরু করা) —After his failure he turned over a new leaf.
With might and main (যথা শক্তি দিয়ে) —He tried with might and main to help me.