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
Call in(ডাকিয়া আনা): They called in a doctor.
Careful of (সতর্ক): He is very careful of his fault.
Destitute of (নিঃস্ব; বিবর্জিত): He is destitute of any friend here.
Guess at (অনুমান করা): It is difficult to guess at the age of women.
Rebel against (বিদ্রোহ করা): The soldiers rebelled against the king.
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Idioms
As a rule (নিয়ম অনুসারে.) As a rule, she kept silent in the meeting.
Make head or tail – (মাথামুন্ডু বুঝা) – I cannot make head or tail of what you say.
Silver tongue (মিষ্টভাষী)- He is a man of silver tongue.
Show good manner (ভালো আচরণ প্রদর্শন ): You should show good manner in the company of young ladies.
Turn over a new leaf (begin a new phase of life, নবজীবন শুরু করা) —After his failure he turned over a new leaf.