Grey matter : মাথার ঘিলু; মগজ;
Related Words
grey matter  ground water  See Words Also In
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Appropriate Prepositions
Due to (কারণে): His absence is due to illness.
Grasp at (আঁকড়িয়ে ধরা): He grasped me at my hand.
Grateful to (কৃতজ্ঞ): We should be grateful to our teachers.
Guess at (অনুমান করা): It is difficult to guess at the age of women.
Solution to (সমাধান): None can solution to every problem.
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Idioms
All up with - (পুরোপুরি, হতাশ, সব আশা শেষ): If we can't, it's all up with the councillor.
At one’s elbow (near at hand — হাতের কাছে – adv.) His private secretary is always at his elbow.
White elephant (অত্যন্ত ব্যয়সাপেক্ষ বিলাসিতা): At last the department proved to be a white elephant.
White color job – (উচ্চ শ্রেনীর চাকরি, যেখানে শারীরিক কাজ নেই বললেই চলে- a job without manual labour) - He wants a white color job.
Wild goose chase (useless pursuit, পন্ডশ্রম) —Do not waste time in wild goose chase.