Old hand : পাকা কারিগর; ওস্তাদ লোক; দক্ষ; অভিজ্ঞ;
Related Words
old hand  old maid  See Words Also In
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Appropriate Prepositions
Behave towards(ব্যবহার করা): The students behaved objectionably towards the Head teacher.
Call in(ডাকিয়া আনা): They called in a doctor.
Convenient to(সুবিধাজনক): The work is convenient to your nature.
Detrimental to (অপকারী): Smoking is detrimental to health.
Rely on (নির্ভর করা): We should not rely on a lazy man.
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Idioms
At least (in the lowest estimate- কমপক্ষে) He is the owner of thirty lakh taka at least.
Bear hard upon (behave rudely-নির্দয়ভাবে ব্যবহার করা - V) Never bear hard upon your servants.
Man of letters (পন্ডিত ব্যক্তি): You are truly a man of letters.
Now and then (মাঝে মাঝে): He comes here now and then.
Widow’s mite (দরিদ্রের ক্ষুদ্র দান): A windows mite is no less important than a large contribution of a rich man.