Decontamination : বিশুদ্ধতা; পরিষ্করণ; পরিপাটিতা; পরিচ্ছন্নতা; সংক্রমণমোচন;
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decontaminating  decontamination  See Words Also In
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Appropriate Prepositions
Alarm at, by, for(আশংকা করা/শঙ্কিত হওয়া): I was not alarmed at/by the news, but I was alarmed for their safety.
Call for(চাওয়া): I will call for his explanation.
Care of(যত্ন নেওয়া): You should take care of your health.
Hope for (আশা করা): Let us hope for the best.
Sick of (ক্লান্ত): He is sick of this idle life.
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Idioms
Out of sorts (সামান্য অসুস্থ): The baby is out of sorts after playing.
Slip of the pen (লেখায় অসতর্কতাবশত সামান্য ভুল): The mistake is due to a slip of the pen.
Silver living (hope- আশা বা ভালো দিক): Every cloud has a silver lining.
To the point (সঠিক) - The boy answered the question to the point.
To the brim (কানায় কানায়) - The river was full to the brim.