Auxiliary : সহায়ক বস্তু, ব্যক্তি;
Related Words
auxiliaries  auxiliary  auxilliary  axillary  See Words Also In
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Appropriate Prepositions
By heart (মুখস্থ): Kamal learnt to poem by heart.
Careful of(যত্নশীল থাকা): Sadia is careful of her health.
Defend against (রক্ষা করা): We will defend our country against all enemies.
Detrimental to (অপকারী): Smoking is detrimental to health.
Quarrel over (কোন বিষয়ে ঝগড়া করা): Do not quarrel over this trifling matter, let it be drop.
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Idioms
At a standstill (নিশ্চল, অচলাবস্থায়-adj.) The discussion is now at a standstill.
Bear hard upon (behave rudely-নির্দয়ভাবে ব্যবহার করা - V) Never bear hard upon your servants.
Crocodile tears (মায়াকান্না): He shed crocodile tears at our misery.
Nip in the bud (অঙ্কুরে বিনষ্ট হওয়া): All his hopes were nipped in the bud.
Read between the lines (understand the significance, অন্তনিহিত অর্থ বুঝা) Try to read between the lines of the letter.