Quaternary : চতুরাত্মক; চতু:সখ্যক; চারটি অংশবিশিষ্ট চতুরঙ্গ;
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Appropriate Prepositions
Care of(যত্ন নেওয়া): You should take care of your health.
Detrimental to (অপকারী): Smoking is detrimental to health.
Feed with (কোনো কিছু খাওয়া): They feed the cow with grass.
Fond of (প্রিয়/অনুরাগী): Children are fond of sweets.
With a view to (উদ্দেশ্য): I went to hospital with a view to seeing you.
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Idioms
Ins and out (খুঁটিনাটি): I know ins and outs of this file.
In black and white – (লিখিতভাবে) – Put forward your proposal in black and white.
Set something right (ঠিক করা)— He will set the machine right.
Tide over (বিপদ অতিক্রম করা-overcome ): The manager tided over the situation.
Up to (পর্যন্ত) - I have done the exercises up to page 40.