A cog in the machine : বিরাট ব্যবস্থা বা পরিকল্পনার এক নগণ্য অংশ;
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Appropriate Prepositions
Consolidate for (শক্তিশালী করা): The four new companies consolidated for greater efficiency.
Grasp at (আঁকড়িয়ে ধরা): He grasped me at my hand.
Look after (দেখাশুনা): He looks after me.
Pity for (করুণা, সমব্যথা): I feel pity for this helpless old man.
Side with (পক্ষ অবলম্বন করা): The Chairman sided with the powerful party.
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Idioms
Bear in mind (মনে রাখা): Always bear in mind that you are a daughter of a reputed person.
Bad names (গালমন্দ—n) He called the man bad names.
Learn by heart (মুখস্থ করা)— He learnt the poem by heart.
Slow coach (অলস): You cannot expect much from a slow coach.
Speed money (ঘুষ; উৎকোচ): He hankers after speed money.