Plano-concave : সমাবতল;
Related Words
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Appropriate Prepositions
Ask about (কাউকে খোঁজ করা): Rahim asked about Karim.
Comply with(মেনে নেওয়া): The clerks must comply with the orders of their officer.
Conscious of(সচেতন): I am conscious of my deficiencies.
Drop to (নিচে নামানো): Asif dropped his voice to a whisper.
Faith in (বিশ্বাস): I have no faith in him.
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Idioms
Bad book (disfavour-খারাপ নজর —n) The secretary has fallen in the bad book of the manager.
Now and then (মাঝে মাঝে): He comes here now and then.
Set something right (ঠিক করা)— He will set the machine right.
Turn down (refuse, প্রত্যাখান করা) —He turned down my proposal.
With might and main (যথা শক্তি দিয়ে) —He tried with might and main to help me.