Systematical : রীতিবন্ধ, প্রণালীবন্ধ, সুব্যবস্থিত, পদ্ধতি অনুযায়ী, নিয়মানুগ;
Related Words
systematical  systematically  See Words Also In
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Appropriate Prepositions
Appoint to(নিযুক্ত করা/হওয়া): Kibria has been appointed to the post of Headmaster.
Argue with, about(কথা কাটাকাটি করা): They always argue with me about tiny matter.
Ask for (কোনো কিছু চাওয়া): Do not ask him for any help because he doesn’t like to help anyone.
Concentrate on(কেন্দ্রীভূত করা): Try to concentrate your attention on your studies.
Rebel against (বিদ্রোহ করা): The soldiers rebelled against the king.
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Idioms
At random (indiscriminately—এলোপাথাড়ি-adv.) He talks at random like a mad man.
Pros and cons (খুঁটিনাটি): You should consider the pros and cons of the system.
Run high (বেড়ে যাওয়া) —The price of everything has run high.
Through and through (পুঙ্খানুপুঙ্খু রুপে)- He read the poem through and through.
Without fail (অবশ্যই) - You must attend the meeting without fail.