Systematics : উদ্ভিদের বর্গীকরণ-বিদ্যা;
Related Words
systematic  systematical  systematically  systematics  systematize  systematized  systematizes  systematizing  See Words Also In
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Appropriate Prepositions
At lunch (দুপুরের খাবারে): They were talking so much at lunch that their food went cold.
Born of(জন্মগ্রহণ করা): I was born of a middle class family.
Deal in, with, out (ব্যবসা করা, ব্যবহার করা, বন্টন করা): The man deals in rice. He does not know how to deal with a customer. The Chairman dealt out the relief materials to the flood affected people.
Guard from/against (রক্ষা করা): My parents always guard me from/against bad people.
Subject to (সাপেক্ষে): The man was appointed subject to the approval of the chairman.
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Idioms
Birds of a feather (persons of like disposition-একই পর্যায়ের লোক) Bird’s of a feather flock together.
Bear hard upon (behave rudely-নির্দয়ভাবে ব্যবহার করা - V) Never bear hard upon your servants.
For good (চিরদিনের জন্য): He left the house for good.
Steer clear of (avoid, দূরে থাকা)— You must steer clear of evil company.
To the utmost (যথাসাধ্য) - I tried to the utmost of my ability to have a job.