Beat the air : বৃথা চেষ্টা করা; অনর্থক পরিশ্রম করা;
Related Words
bather  batter  battery  beat the air  beater  better  See Words Also In
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Appropriate Prepositions
Adapt for (উপযোগী করে নেওয়া): This book has been adapted for the children.
Concerned for (উদ্বিগ্ন): The parents are concerned for their growing children.
Despair of (নিরাশ হওয়া): Do not despair of further improvement.
Dull at (অপ্টু/কাঁচা): He is dull at mathematics.
Sad at (দুঃখিত): All his colleagues were very sad at his transfer from this place.
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Idioms
Dead language (যে ভাষা এখন আর কথ্য নয়): Sanskrit is a rich language, but it is now a dead language.
For good (চিরদিনের জন্য): He left the house for good.
Look into something (তদন্ত করা- investigate) - The manager looked into the matter.
Pick a quarrel (ঝগড়া করা)—Do not pick a quarrel.
To the letter (in all details, অক্ষরে অক্ষরে) —Follow my advice to the letter.