Planoconvex : সমোত্তল;
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plano-convex  planoconvex  See Words Also In
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Appropriate Prepositions
Abhorrent to(ঘৃণ্য): Racism of any kind is abhorrent to me.
Cause for (চিন্তিত হওয়ার কারণ): He has never given me any cause for concern.
Conceal from(লুকানো) Do not conceal anything from me.
Damage to (ক্ষতি): The flood caused much damage to crops last year.
Pity for (করুণা, সমব্যথা): I feel pity for this helpless old man.
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Idioms
At a standstill (নিশ্চল, অচলাবস্থায়-adj.) The discussion is now at a standstill.
At the eleventh hour (at the last moment-শেষ মুহুর্তে adv.) The patient was in a dangerous condition and the doctor came at the eleventh hour.
Make head or tail – (মাথামুন্ডু বুঝা) – I cannot make head or tail of what you say.
Pass away (মারা যাওয়া)— He passed away last night.
With the sweat of one’s brow (মাথার ঘাম পায়ে ফেলে) — He earns his livelihood with the sweat of his brow.