Co-operator : সহযোগী; সহায়ক;
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Appropriate Prepositions
Argue against (বিপক্ষে বলা): She argued against the bill.
Argue over (কোন বিষয়ে তর্ক করা): The kids are arguing over which TV program to watch.
Deprived of (বঞ্চিত): He was deprived of education due to extreme poverty.
Feed with (কোনো কিছু খাওয়া): They feed the cow with grass.
Work for (কারো জন্য কাজ করা): She works for a construction company.
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Idioms
Back and bally (জীবিকা, ভরণ পোষণ—n) Who will provide the increasing population with the required back and bally?
Bear (a) grudge (bear hostility to— শত্রুতা বা বিদ্বেষ পোষন করা—V) We should not bear (a) grudge against our brethren.
Fair play (প্রতারণা বিহীন নীতি বা কাজ): I believe in the practice of fair play in my business.
Lame excuse (বাজে ওজর): The lame excuse will not do.
Scapegoat (উদোর পিন্ডি বুধোর ঘাড়ে)—He was made scapegoat of the incident.