Clear-headed : বিচক্ষণ;
Related Words
clear the air  clear-eyed  clear-headed  cleared  clearheaded  See Words Also In
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Appropriate Prepositions
Abstain from(বিরত থাকা): I am trying to abstain from sweets for my new diet.
Delighted at/with (আনন্দিত হওয়া): Sharmin was delighted at/with her husband’s promotion.
Devoted to (মনোযোগী): He is devoted to music.
Penalty for, with (দণ্ড, জরিমানা): She has paid the penalty for the misuse of power with two years in prison.
Subject to (সাপেক্ষে): The man was appointed subject to the approval of the chairman.
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Idioms
Do yeoman’s service (বিশেষ উপকার করা): Freedom fighters have done yeoman’s service for country.
Hue and cry (শোরগোল): The villagers raised a hue and cry to see the thief.
In no time (শীঘ্র): He will finish the work in no time.
Red letter day (স্মরণীয় দিন): The 16th December is a red letter day for us.
Take to heart (মর্মাহত হওয়া)- He really took it to heart when I asked him to reconsider.