Clear-headed : বিচক্ষণ;
Related Words
clear the air  clear-eyed  clear-headed  cleared  clearheaded  See Words Also In
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Appropriate Prepositions
By heart (মুখস্থ): Kamal learnt to poem by heart.
Damage to (ক্ষতি): The flood caused much damage to crops last year.
Hanker after (আকাঙ্ক্ষা/লোভ করা): He hankers after riches.
Inferior to (নীচু/হীন): He is inferior to his neighbor.
Loyal to (অনুগত): Every citizen must be loyal to the state.
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Idioms
Bird’s eye view - (ভাসা ভাসা দৃশ্য, হালকাভাবে দর্শন): We took a bird’s eye view of the scenery.
Back and bally (জীবিকা, ভরণ পোষণ—n) Who will provide the increasing population with the required back and bally?
Be all and end all (the ultimate out come- চরম পরিণতি—n) A loss of one million taka was the be all and end all of the projects.
Turn over a new leaf (begin a new phase of life, নবজীবন শুরু করা) —After his failure he turned over a new leaf.
With a lavish hand (মুক্ত হস্তে)— Give away something with a lavish hand.