Unsound mind : বিকৃত মস্তিষ্ক;
Related Words
unconditioned  unsound mind  See Words Also In
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Appropriate Prepositions
Afraid of(ভীত): An honest man is not afraid of telling the truth.
Desist from (বিরত থাকা): She desisted from making this.
Genius for (দক্ষতা): Nazrul had a genius for convincing girls.
Rebel against (বিদ্রোহ করা): The soldiers rebelled against the king.
Remedy for (প্রতিকার): There is no remedy for cancer.
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Idioms
Bird’s eye view - (ভাসা ভাসা দৃশ্য, হালকাভাবে দর্শন): We took a bird’s eye view of the scenery.
Bad names (গালমন্দ—n) He called the man bad names.
Square meal (পেট ভরা আহার): He is too poor to have a square meal everyday.
To the letter (in all details, অক্ষরে অক্ষরে) —Follow my advice to the letter.
Upper hand (প্রাধান্য) - He got the upper hand in the selection.